java86-Interage方法compareto，parseint，intvalue

public class test22 {
     public static void main(String[] args){
         int num=5;
         Integer obj1=new Integer(num);
         System.out.println("obj1的值为"+obj1);
         Integer obj2=100;
         System.out.println("obj2的值为"+obj2);
         Integer obj3=new Integer("-789");
         System.out.println("obj3的值为"+obj3);
  
         System.out.println(Integer.BYTES);
         System.out.println(Integer.MAX_VALUE);
         System.out.println(Integer.MIN_VALUE);
         System.out.println(Integer.SIZE);
  
         //比较大小
         System.out.println(obj2.compareTo(100));
         System.out.println(obj2.compareTo(102));
         System.out.println(obj2.compareTo(10));
  
         //返回值类型
         int num1=obj2.intValue();
         System.out.println(num1);
  
         //将一个字符串转换为int数据返回
         int str1=Integer.parseInt("125");
         System.out.println(str1+12);
 }
 }

运行结果