Java quiz. What will be printed by the following code? <pre><

What will be printed by the following code?


public class Test {
    static Boolean bo1 = new Boolean("true");
    static Boolean bo2 = new Boolean(false);

    public static void main(String[] args) {
        Boolean bo3 = new Boolean(bo1);
        Boolean bo4 = new Boolean("bo2");
        System.out.println(bo1.equals(bo3));
        System.out.println(bo2.equals(bo4));
    }
}

false
false
false
true
true
true
true
false
Compilation error
Run-time error

Explanation

The constructor Boolean(String) creates an object with a value of true, if it passed the string "true" (in any register). Otherwise, the object will be created with the value false.
Therefore, the objects will have the following meanings:
bo1 – true
bo2 – false
bo3 – true
bo4 – false
When comparing objects with the same value (bo1 and bo3, bo2 and bo4) the method equals() returns the value true.