Java finally example 2017-05-04 04:22
The code in finally block will always be executed except invoke System.exit() method. The example code is like following.
Test nest finally
public class TestFinally {
public static void main(String[] args) throws Exception {
String test = "test";
try {
try {
if (test.equals("test")) {
throw new Exception("test");
}
} finally {
System.out.println("first finally");
}
} catch (Exception e) {
System.out.println("throw exception");
} finally {
System.out.println("finally");
}
}
}
The output is like following.
first finally
throw exception
finally
Test finally and return
public class TestFinallyReturn {
public static void main(String[] args) throws Exception {
try {
System.out.println("begin");
int i = 10 + 1;
if (i > 10) {
return;
}
System.out.println("not here");
} finally {
System.out.println("finally");
}
}
}
The output is like following.
begin
finally
Test finally and System.exit()
public class TestFinallySystemExit {
public static void main(String[] args) {
try{
System.out.println("begin");
System.exit(0);
}finally {
System.out.println("this is finally");
}
}
}
The output is like following.
begin
EOF