复制代码 代码如下:

public class Wrapper {

public static void main(String[] args) {

int i = 500;

Integer t = new Integer(i);

int j = t.intValue();

String s = t.toString();

System.out.println(t);

Integer t1 = new Integer(500);

System.out.println(t.equals(t1));

Integer a1 = 5;

int a2 = new Integer(5);

System.out.println("a1 = " + a1 + ",a2 = " + a2);

}

}

结果：

D:javacode>javac Wrapper.java

D:javacode>java Wrapper

500

true

a1 = 5,a2 = 5