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Quick Assist
</title>
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<h1>
Quick Assist
</h1>
<p>
Quick assists perform local code transformations. They are invoked on a
selection or a single cursor in the Java editor and use the same shortcut
as quick fixes (<b>Ctrl+1</b>), but quick assist are usually hidden when
an error is around. To show them even with errors present on the same
line, press <b>Ctrl+1</b> a second time.<br />
<br />
A selection of quick assists can be assigned to a direct shortcut. By
default, these are:
</p>
<ul>
<li>Rename in file: <b>Ctrl+2, R</b>
</li>
<li>Assign to local: <b>Ctrl+2, L</b>
</li>
<li>Assign to field: <b>Ctrl+2, F</b>
</li>
</ul>
<p>
Assign more shortcuts or change the default shortcuts on the <a class=
"command-link" href=
'javascript:executeCommand("org.eclipse.ui.window.preferences(preferencePageId=org.eclipse.ui.preferencePages.Keys)")'>
<img src="PLUGINS_ROOT/org.eclipse.help/command_link.png" alt=
"Opens keys preference page" /> <b>General &gt; Keys</b></a> preference
page (in the 'Source' category).<br />
<br />
A quick assist light bulb can be turned on on the <a class="command-link"
href=
'javascript:executeCommand("org.eclipse.ui.window.preferences(preferencePageId=org.eclipse.jdt.ui.preferences.JavaEditorPreferencePage)")'>
<img src="PLUGINS_ROOT/org.eclipse.help/command_link.png" alt=
"Opens Java editor preference page" /> <b>Java &gt; Editor</b></a>
preference page.<br />
</p>
<table class="c7" border="2" cellpadding="5" summary=
"List of quick assists">
<tbody>
<tr>
<th class="c1" width="15%">
Name
</th>
<th colspan="3" rowspan="1" class="c2">
Code example
</th>
<th class="c1" width="15%">
Invocation location
</th>
</tr>
<tr>
<td class="c3" width="15%">
Inverse if statement
</td>
<td class="c4" width="34%">
<code>if (x) a(); else b();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (!x) b(); else a();</code>
</td>
<td class="c3" width="15%">
On 'if' statements with 'else' block
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to if-!-return
</td>
<td class="c4" width="34%">
<code>if (x == 1) a();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (x != 1) return; <br />
a();
</code>
</td>
<td class="c3" width="15%">
On an 'if' statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Inverse boolean expression
</td>
<td class="c4" width="34%">
<code>a &amp;&amp; !b</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>!a || b</code>
</td>
<td class="c3" width="15%">
On a boolean expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Invert local variable
</td>
<td class="c4" width="34%">
<code>boolean a = false;<br />
if (a) {}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>boolean notA = true;<br />
if (!notA) {}</code>
</td>
<td class="c3" width="15%">
On a boolean variable
</td>
</tr>
<tr>
<td class="c3" width="15%">
Invert equals
</td>
<td class="c4" width="34%">
<code>a.equals(b)</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>b.equals(a)</code>
</td>
<td class="c3" width="15%">
On a invocation of 'equals'
</td>
</tr>
<tr>
<td class="c3" width="15%">
Inverse conditional expression
</td>
<td class="c4" width="34%">
<code>x ? b : c</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>!x ? c : b</code>
</td>
<td class="c3" width="15%">
On a conditional expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Pull negation up
</td>
<td class="c4" width="34%">
<code>b &amp;&amp; c</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>!(!b || !c)</code>
</td>
<td class="c3" width="15%">
On a boolean expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Push negation down
</td>
<td class="c4" width="34%">
!(<code>b &amp;&amp; c)</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
!<code>b || !c</code>
</td>
<td class="c3" width="15%">
On a negated boolean expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Remove extra parentheses
</td>
<td class="c4" width="34%">
<code>if ((a == b) &amp;&amp; (c != d)&nbsp; {}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a == b &amp;&amp; c != d)&nbsp; {}</code>
</td>
<td class="c3" width="15%">
On selected expressions
</td>
</tr>
<tr>
<td class="c3" width="15%">
Put expression in parentheses
</td>
<td class="c4" width="34%">
<code>return a &gt; 10 ? 1 : 2;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>return (a &gt; 10) ? 1 : 2;</code>
</td>
<td class="c3" width="15%">
On selected expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Put expressions in parentheses
</td>
<td class="c4" width="34%">
<code>if (a == b &amp;&amp; c != d)&nbsp; {}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if ((a == b) &amp;&amp; (c != d))&nbsp; {}</code>
</td>
<td class="c3" width="15%">
On selected expressions
</td>
</tr>
<tr>
<td class="c3" width="15%">
Join nested if statements
</td>
<td class="c4" width="34%">
<code>if (a) { if (b) {} }</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a &amp;&amp; b) {}</code>
</td>
<td class="c3" width="15%">
On a nested if statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Swap nested if statements
</td>
<td class="c4" width="34%">
<code>if (a) { if (b) {} }</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (b) { if (a) {} }</code>
</td>
<td class="c3" width="15%">
On a nested if statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Split if statement with and'ed expression
</td>
<td class="c4" width="34%">
<code>if (a &amp;&amp; b) {}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) { if (b) {} }</code>
</td>
<td class="c3" width="15%">
On an and'ed expression in a 'if'
</td>
</tr>
<tr>
<td class="c3" width="15%">
Join selected 'if' statements with ||
</td>
<td class="c4" width="34%">
<code>if (a) x();&nbsp; if (b) x();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a || b) x();</code>
</td>
<td class="c3" width="15%">
On selected 'if' statements
</td>
</tr>
<tr>
<td class="c3" width="15%">
Join 'if' sequence in if-else-if
</td>
<td class="c4" width="34%">
<code>if (a) x();&nbsp; if (b) y();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) x();&nbsp; else if (b) y();</code>
</td>
<td class="c3" width="15%">
On selected 'if' statements
</td>
</tr>
<tr>
<td class="c3" width="15%">
Split if statement with or'd expression
</td>
<td class="c4" width="34%">
<code>if (a || b) x();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) x();&nbsp; if (b) x();</code>
</td>
<td class="c3" width="15%">
On an or'd expression in a 'if'
</td>
</tr>
<tr>
<td class="c3" width="15%">
If-else assignment to conditional expression
</td>
<td class="c4" width="34%">
<code>if (a) x= 1; else x= 2;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>x= a ? 1 : 2;</code>
</td>
<td class="c3" width="15%">
On an 'if' statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
If-else return to conditional expression
</td>
<td class="c4" width="34%">
<code>if (a) return 1;<br />
else return 2;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>return a ? 1 : 2;</code>
</td>
<td class="c3" width="15%">
On an 'if' statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Conditional expression assignment to If-else
</td>
<td class="c4" width="34%">
<code>x= a ? 1 : 2;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) x= 1; else x= 2;</code>
</td>
<td class="c3" width="15%">
On a conditional expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Conditional expression return to If-else
</td>
<td class="c4" width="34%">
<code>return&nbsp; a ? 1 : 2;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) return 1; else return 2;</code>
</td>
<td class="c3" width="15%">
On a conditional expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Switch to If-else
</td>
<td class="c4" width="34%">
<code>switch (kind) {<br />
case 1: return -1;<br />
case 2: return -2;<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (kind == 1) {<br />
&nbsp;&nbsp;return -1;<br />
} else if (kind == 2) {<br />
&nbsp;&nbsp;return -2;<br />
}</code>
</td>
<td class="c3" width="15%">
On a switch statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert if-else to switch
</td>
<td class="c3" width="34%">
<code>if (kind == 1) {<br />
&nbsp;&nbsp;return -1;<br />
} else if (kind == 2) {<br />
&nbsp;&nbsp;return -2;<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c4" width="34%">
<code>switch (kind) {<br />
case 1: return -1;<br />
case 2: return -2;<br />
}</code>
</td>
<td class="c3" width="15%">
On an 'if' statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Add missing case statements on enums
</td>
<td class="c4" width="34%">
<code>switch (e){<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>switch (e){<br />
case E1: break;<br />
case E2: break;<br />
}</code>
</td>
<td class="c3" width="15%">
On a switch statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Exchange operands
</td>
<td class="c4" width="34%">
<code>a + b</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>b + a</code>
</td>
<td class="c3" width="15%">
On an infix operation
</td>
</tr>
<tr>
<td class="c3" width="15%">
Cast and assign
</td>
<td class="c4" width="34%">
<code>if (obj instanceof Vector) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (obj instanceof Vector) {<br />
&nbsp;Vector vec= (Vector)obj;</code><br />
}
</td>
<td class="c3" width="15%">
On an instanceof expression in an 'if' or 'while' statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Use separate catch blocks
</td>
<td class="c4" width="34%">
<code>try {<br />
} catch (FileNotFoundException | InterruptedIOException e) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>try {<br />
} catch (FileNotFoundException e) {<br />
} catch (InterruptedIOException e) {<br />
}</code>
</td>
<td class="c3" width="15%">
On a multi-catch block (1.7 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Move exceptions to separate catch blocks
</td>
<td class="c4" width="34%">
<code>try {<br />
} catch (FileNotFoundException | InterruptedIOException | IllegalArgumentException e) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>try {<br />
} catch (FileNotFoundException e) {<br />
} catch (InterruptedIOException | IllegalArgumentException e) {<br />
}</code>
</td>
<td class="c3" width="15%">
On exceptions in a multi-catch clause (1.7 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Combine catch blocks
</td>
<td class="c4" width="34%">
<code>try {<br />
} catch (FileNotFoundException e) {<br />
} catch (InterruptedIOException e) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>try {<br />
} catch (FileNotFoundException | InterruptedIOException e) {<br />
}</code>
</td>
<td class="c3" width="15%">
On a catch block (1.7 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Add finally block
</td>
<td class="c4" width="34%">
<code>try {<br />
} catch (Exception e) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>try {<br />
} catch (Exception e) {<br />
} finally {}</code>
</td>
<td class="c3" width="15%">
On a try/catch statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Add else block
</td>
<td class="c4" width="34%">
<code>if (a) b();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) b(); else { }</code>
</td>
<td class="c3" width="15%">
On a if statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Replace statement with block
</td>
<td class="c4" width="34%">
<code>if (a) b();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>if (a) { b(); }</code>
</td>
<td class="c3" width="15%">
On a if statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Unwrap blocks
</td>
<td class="c4" width="34%">
<code>{ a() }</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>a()</code>
</td>
<td class="c3" width="15%">
On blocks, if/while/for statements
</td>
</tr>
<tr>
<td class="c3" width="15%">
Combine to single String
</td>
<td class="c4" width="34%">
<code>String phrase= "one" + " two " + "three";</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>String phrase= "one two three";</code>
</td>
<td class="c3" width="15%">
On a string concatenation expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Pick out string
</td>
<td class="c4" width="34%">
<code>"abcdefgh"</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>"abc" + "de" + "fgh"</code>
</td>
<td class="c3" width="15%">
select a part of a string literal
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert string concatenation to StringBuilder (J2SE 5.0) or
StringBuffer
</td>
<td class="c4" width="34%">
<code>"Hello " + name</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>StringBuilder builder= new StringBuilder();<br />
builder.append("Hello ");<br />
builder.append(name);</code>
</td>
<td class="c3" width="15%">
select a string literal
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert string concatenation to MessageFormat
</td>
<td class="c4" width="34%">
<code>"Hello " + name</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>MessageFormat.format("Hello {0}", name);</code>
</td>
<td class="c3" width="15%">
select a string literal
</td>
</tr>
<tr>
<td class="c3" width="15%">
Split variable
</td>
<td class="c4" width="34%">
<code>int i= 0;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int i; i= 0;</code>
</td>
<td class="c3" width="15%">
On a variable with initialization
</td>
</tr>
<tr>
<td class="c3" width="15%">
Join variable
</td>
<td class="c4" width="34%">
<code>int i; i= 0;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int i= 0</code>
</td>
<td class="c3" width="15%">
On a variable without initialization
</td>
</tr>
<tr>
<td class="c3" width="15%">
Assign to variable
</td>
<td class="c4" width="34%">
<code>foo()</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>X x= foo();</code>
</td>
<td class="c3" width="15%">
On an expression statement
</td>
</tr>
<tr>
<td class="c3" width="15%">
Extract to local
</td>
<td class="c4" width="34%">
<code>foo(getColor());</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Color color= getColor();<br />
foo(color);</code>
</td>
<td class="c3" width="15%">
On an expression
</td>
</tr>
<tr>
<td class="c3" width="15%">
Assign parameter to field
</td>
<td class="c4" width="34%">
<code>public A(int color) {}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int fColor;<br />
public A(int color) {<br />
&nbsp;&nbsp;&nbsp; fColor= color;<br />
}</code>
</td>
<td class="c3" width="15%">
On a parameter
</td>
</tr>
<tr>
<td class="c3" width="15%">
Assign all parameters to new fields
</td>
<td class="c4" width="34%">
<code>public A(int color, String name) {}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int fColor;<br />
<code>String fName;<br />
public A(int color, String name) {<br />
&nbsp;&nbsp;&nbsp; fColor= color;<br />
&nbsp;&nbsp;&nbsp; fName= name;<br />
}</code>
</td>
<td class="c3" width="15%">
On a parameter
</td>
</tr>
<tr>
<td class="c3" width="15%">
Array initializer to Array creation
</td>
<td class="c4" width="34%">
<code>int[] i=&nbsp; { 1, 2, 3 }</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int[] i= new int[] { 1, 2, 3 }</code>
</td>
<td class="c3" width="15%">
On an array initializer
</td>
</tr>
<tr>
<td class="c3" width="15%">
Create 'for' loops
</td>
<td class="c4" width="34%">
<code>
void foo(Map&lt;String, Integer&gt; map) {<br />
&nbsp;&nbsp;&nbsp;map.keySet();<br />
}<br />
</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>
void foo(Map&lt;String, Integer&gt; map) {<br />
&nbsp;&nbsp;for (String string : map.keySet()) {<br />
&nbsp;&nbsp;}<br />
}<br />
</code>
</td>
<td class="c3" width="15%">
On arrays, <code>Collection</code>s and <code>List</code>s
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to 'enhanced for loop' (J2SE 5.0)
</td>
<td class="c4" width="34%">
<code>for (Iterator i= c.iterator();i.hasNext();) {<br />
}<br /></code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>for (x : c) {<br />
}</code>
</td>
<td class="c3" width="15%">
On a for loop
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to indexed 'for' loop (J2SE 5.0)
</td>
<td class="c4" width="34%">
<code>for (x : c) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>for (int i = 0; i &lt; c.size(); i++) {<br />
&nbsp;&nbsp;&nbsp;&nbsp;x = c[i];<br />
}<br /></code>
</td>
<td class="c3" width="15%">
On an enhanced for loop
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to Iterator-based 'for' loop (J2SE 5.0)
</td>
<td class="c4" width="34%">
<code>for (x : c) {<br />
}</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>for (Iterator i= c.iterator();i.hasNext();) {<br />
}<br /></code>
</td>
<td class="c3" width="15%">
On an enhanced for loop
</td>
</tr>
<tr>
<td class="c3" width="15%">
Create method in super class
</td>
<td class="c4" width="34%">
<br />
</td>
<td class="c3">
<br />
</td>
<td class="c3" width="34%">
<br />
</td>
<td class="c3" width="15%">
On a method declaration
</td>
</tr>
<tr>
<td class="c3" width="15%">
Rename in file
</td>
<td class="c4" width="34%">
<br />
</td>
<td class="c3">
<br />
</td>
<td class="c3" width="34%">
<br />
</td>
<td class="c3" width="15%">
On identifiers
</td>
</tr>
<tr>
<td class="c3" width="15%">
Rename in workspace
</td>
<td class="c4" width="34%">
<br />
</td>
<td class="c3">
<br />
</td>
<td class="c3" width="34%">
<br />
</td>
<td class="c3" width="15%">
On identifiers
</td>
</tr>
<tr>
<td class="c3" width="15%">
Extract to local variable
</td>
<td class="c4" width="34%">
<code>a= b*8;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int x= b*8;<br />
a= x;</code>
</td>
<td class="c3" width="15%">
On expressions
</td>
</tr>
<tr>
<td class="c3" width="15%">
Extract to constant
</td>
<td class="c4" width="34%">
<code>a= 8;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>final static int CONST= 8;<br />
a= CONST;</code>
</td>
<td class="c3" width="15%">
On expressions
</td>
</tr>
<tr>
<td class="c3" width="15%">
Extract method
</td>
<td class="c4" width="34%">
<code>int x= p * 5;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int x= getFoo(p);</code>
</td>
<td class="c3" width="15%">
On expressions and statements
</td>
</tr>
<tr>
<td class="c3" width="15%">
Inline local variable
</td>
<td class="c4" width="34%">
<code>int a= 8, b= a;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int b= 8;</code>
</td>
<td class="c3" width="15%">
On local variables
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert local variable to field
</td>
<td class="c4" width="34%">
<code>void foo() { int a= 8; }</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>int a= 8; void foo() {}</code>
</td>
<td class="c3" width="15%">
On local variables
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert anonymous to nested class
</td>
<td class="c4" width="34%">
<code>new Runnable() { };</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>class RunnableImplementation implements Runnable { }</code>
</td>
<td class="c3" width="15%">
On anonymous classes
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to lambda expression
</td>
<td class="c4" width="34%">
<code>Runnable r= new Runnable() {<br />
&nbsp;&nbsp;public void run() {}<br />
};
</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Runnable r= () -&gt; {};</code>
</td>
<td class="c3" width="15%">
On anonymous classes implementing a functional interface (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to anonymous class creation
</td>
<td class="c4" width="34%">
<code>Runnable r= () -&gt; {};</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Runnable r= new Runnable() {<br />
&nbsp;&nbsp;public void run() {}<br />
};
</code>
</td>
<td class="c3" width="15%">
On lambda expressions (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to lambda expression
</td>
<td class="c4" width="34%">
<code>Consumer&lt;Integer&gt; c= System.out::println;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Consumer&lt;Integer&gt; c= t -&gt; System.out.println(t);</code>
</td>
<td class="c3" width="15%">
On method references (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Convert to method reference
</td>
<td class="c4" width="34%">
<code>Consumer&lt;Integer&gt; c= t -&gt; System.out.println(t);</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Consumer&lt;Integer&gt; c= System.out::println;</code>
</td>
<td class="c3" width="15%">
On lambda expressions (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Change body expression to block
</td>
<td class="c4" width="34%">
<code>Runnable r= () -&gt; System.out.println();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Runnable r= () -> {<br />
&nbsp;&nbsp;System.out.println();<br />
};
</code>
</td>
<td class="c3" width="15%">
On lambda expressions with body as expression (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Change body block to expression
</td>
<td class="c4" width="34%">
<code>Runnable r= () -> {<br />
&nbsp;&nbsp;System.out.println();<br />
};
</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Runnable r= () -&gt; System.out.println();</code>
</td>
<td class="c3" width="15%">
On lambda expressions with body as block (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Add inferred lambda parameter types
</td>
<td class="c4" width="34%">
<code>Consumer&lt;Integer&gt; c= t -&gt; System.out.println(t);</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Consumer&lt;Integer&gt; c= (Integer t) -&gt; System.out.println(t);</code>
</td>
<td class="c3" width="15%">
On lambda expressions with inferred parameter types (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Add parentheses around lambda parameter
</td>
<td class="c4" width="34%">
<code>Consumer&lt;Integer&gt; c= t -&gt; System.out.println(t);</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Consumer&lt;Integer&gt; c= (t) -&gt; System.out.println(t);</code>
</td>
<td class="c3" width="15%">
On lambda expressions (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Remove parentheses around lambda parameter
</td>
<td class="c4" width="34%">
<code>Consumer&lt;Integer&gt; c= (t) -&gt; System.out.println(t);</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>Consumer&lt;Integer&gt; c= t -&gt; System.out.println(t);</code>
</td>
<td class="c3" width="15%">
On lambda expressions (1.8 or higher)
</td>
</tr>
<tr>
<td class="c3" width="15%">
Replace with getter and setter (Encapsulate Field)
</td>
<td class="c4" width="34%">
<code>p.x;</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>p.getX();</code>
</td>
<td class="c3" width="15%">
On fields
</td>
</tr>
<tr>
<td class="c3" width="15%">
Insert inferred type arguments
</td>
<td class="c4" width="34%">
<code>List&lt;String&gt; list = new ArrayList&lt;&gt;();</code>
</td>
<td class="c3">
&gt;
</td>
<td class="c3" width="34%">
<code>List&lt;String&gt; list = new ArrayList&lt;String&gt;();</code>
</td>
<td class="c3" width="15%">
On generic instance creation expressions (1.7 or higher)
</td>
</tr>
</tbody>
</table>
<br />
<p>The following quick assists are available in the <b>Properties File Editor</b>:</p>
<ul>
<li><b>Rename in workspace</b> - renames the key in the properties file and updates all references</li>
<li><b>Create field in '...'</b> - creates the corresponding field in the resource bundle accessor class</li>
<li><b>Remove property</b> - deletes the property from the properties file and the field from the resource bundle accessor class</li>
<li><b>Remove properties</b> - deletes the selected properties from the properties file and the fields from the resource bundle accessor class</li>
<li><b>Escape backslashes</b> - escape all backslashes in the selected text</li>
<li><b>Escape backslashes in original string</b> - escape all backslashes in the pasted text</li>
<li><b>Unescape backslashes</b> - unescape all backslashes in the selected text</li>
</ul>
<p>
<img src="../images/ngrelc.png" alt="Related concepts" border="0" />
</p>
<p>
<a href="../concepts/concept-java-editor.htm">Java Editor</a><br />
<a href="../concepts/concept-quickfix-assist.htm">Quick Fix and Quick
Assist</a>
</p>
<p>
<img src="../images/ngrelr.png" alt="Related reference" border="0" />
</p>
<p>
<a href="ref-java-editor-quickfix.htm">Quick Fix</a><br />
<a href="../reference/ref-jdt-actions.htm">JDT actions</a>
</p>
</body>
</html>