public class Main { public static void main(String[] args) { Test test = new Test(true); } } class Test { public Test(){ System.out.println("Constructor one invoked!"); } public Test(int x){ System.out.println("Constructor two invoked!"); } public Test(boolean b){ System.out.println("Constructor three invoked!"); } } 使得程序输出结果，如下所示。 Constructor one invoked! Constructor two invoked! Constructor three invoked!

可以通过以下代码实现：

public class Main {
    public static void main(String[] args) {
        Test test1 = new Test();
        Test test2 = new Test(1);
        Test test3 = new Test(true);
    }
}

class Test {
    public Test() {
        System.out.println("Constructor one invoked!");
    }

    public Test(int x) {
        System.out.println("Constructor two invoked!");
    }

    public Test(boolean b) {
        System.out.println("Constructor three invoked!");
    }
}

输出结果为：

Constructor one invoked!
Constructor two invoked!
Constructor three invoked!