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