org.eclipse.jdt.debug.tests/testprograms/LocalVariablesTests.java

/**********************************************************************
Copyright (c) 2000, 2002 IBM Corp. and others.
All rights reserved. This program and the accompanying materials
are made available under the terms of the Common Public License v0.5
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/cpl-v05.html

Contributors:
    IBM Corporation - Initial implementation
**********************************************************************/

public class LocalVariablesTests {
	public static void nop() {
		// used to allow breakpoint on otherwise empty lines
	}
	
	public static void simpleTest() {
		nop(); // should see no local variables here
		int i1 = 0;
		nop(); // should see 1 local variable: i1
		int i2 = 1;
		nop(); // should see 2 local variables: i1 && i2
	}

	public static void outerMethod() {
		int i1 = 0;
		innerMethod();
		// i1 visible and i1==0, i2 not visible
		int i2 = 1;
		nop();
	}

	public static void innerMethod() {
		int i2 = 7;
		nop(); // i1 not visible in the top stack frame, i2 visible
	}
	
	public static void testFor() {
		nop(); // should see no variable
		for (int i = 0; i < 1; i++) {
			nop(); // should see i
			for (int j = 0; j < 1; j++) {
				nop(); // 	should see i, j
				Object obj = null;
				nop(); // should see i, j, obj
				obj = "foo";
			}
		}
		nop(); // should not see i and j
	}
	
	public static void testIf(boolean cond) {
		if (cond) {
			Object ifObj = new String("true");
			nop();
		} else {
			Object elseObj = new String("false");
			nop();
		}
		nop();
	}
	
	public static void testWhile() {
		int i = 0;
		while (i < 1) {
			int j = i/2;
			nop(); // should see i & j
			i++;
		}
	}
	
	public static void testTryCatch() {
		try {
			String str = null;
			nop(); // should see str
			str.length();
		} catch (NullPointerException ex) {
			nop(); // should see ex
 		} finally {
 			nop(); // should see str
 		}
	}
	
	public static void testAliasing() {
		String str1 = new String("value");
		String str2 = str1;
		nop();
	}

	public static void main(String[] args) {
		simpleTest();  // @see LocalVariablesTests.testSimple()
		outerMethod(); // @see LocalVariablesTests.testMethodCall()
		testFor();    // @see LocalVariablesTests.testFor()
		testIf(true);  // @see LocalVariablesTests.testIf()
		testIf(false); // @see LocalVariablesTests.testIf()
		testWhile();   // @see LocalVariablesTests.testWhile()
		testTryCatch();// @see LocalVariablesTests.testTryCatch()
		testAliasing(); // @see LocalVariablesTests.testAliasing()

	}
}