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assert

 
Greenhorn
Posts: 25
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can somebody explain ? thks
public class Qf1e3 {
String s1;
String s2 = "hello";
String s3;
Qf1e3() {
s1 = "hello";
}
public static void main(String[] args) {
(new Qf1e3()).f();
}
{
s3 = "hello";
}
void f() {
String s4 = "hello";
String s5 = new String("hello");
assert(s1.equals(s2)); // (1)
assert(s2.equals(s3)); // (2)
assert(s3 == s4); // (3)
assert(s4 == s5); // (4)
}
}
 
Ranch Hand
Posts: 1090
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Hi Jioy
Well in this code the line with comment //4 is throwing an AssertionException because the expression is evaluated to false s4 and s5 store different object references.
Try placing a System.out.println("This prints"); or kinda that on the line jsut before //4 and you will that the line just before //4 will get printed.
 
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