Jonathan Lalou's Blog

A short reminder: in a try/catch/finally section, the block in the finally is always executed. “Always” means “even if a return statement is reached in the try or catch“.

A short piece of code shows more than a long speech. The following JUnit test ends with no error:
[java]package com.stepinfo.poc.cartography;

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotSame;

/**
* Created with IntelliJ IDEA 12 "Leda" CE
* User: Jonathan LALOU
* Date: 08/Apr/13
* Time: 22:41
*/
public class TestTryCatchFinally {

public static final String TRY = "try";
public static final String CATCH = "catch";
public static final String FINALLY = "finally";

private String tryVersusFinally() {
try {
return TRY;
} catch (Exception e) {
return CATCH;
} finally {
return FINALLY;
}
}

private String catchVersusFinally() {
try {
throw new RuntimeException();
} catch (Exception e) {
return CATCH;
} finally {
return FINALLY;
}
}

@Test
public void testTryFinally() {
assertNotSame(TRY, tryVersusFinally());
assertEquals(FINALLY, tryVersusFinally());
}

@Test
public void testCatchFinally() {
assertNotSame(CATCH, tryVersusFinally());
assertEquals(FINALLY, catchVersusFinally());
}
}
[/java]