下面程序结果为：(     )

public class Tester {
    public static void main(String[] args) {
        int x = 5;
        Integer x1 = x；
        Integer x2 = x;
        int x3 = new Integer(5);
        System.out.print(x1.equals(x));
        System.out.print(x1 == x);
        System.out.print(x2.equals(x1));
        System.out.print(x2 == x1);
        System.out.print(x2 == x3);
        System.out.print(x2.equals(x3));
    }
}