听说是面试题

Integer int1 = 30;
Integer int2 = 30;
Integer int3 = 0;
System.out.println(int1 == int2);
System.out.println(int1 == int2 + int3);

Integer int4 = new Integer(30);
Integer int5 = new Integer(30);
Integer int6 = new Integer(0);
System.out.println(int4 == int5);
System.out.println(int4 == int5 + int6);

求输出