包装类

public class PackagingClass {
    public static void main(String[] args) {
        int num=5;
        String s=num+" ";//将基本数据类型转换为String
        System.out.println(s);
        Integer integer=new Integer(1);//装箱
        System.out.println(integer);//重写了toString方法
        Integer in = new Integer("1");//装箱
        System.out.println(in);
        Integer int1=Integer.valueOf(16);//装箱
        System.out.println(int1);
        int num1=in;//拆箱
        System.out.println(num1);

    }

}