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