java87-Interage包装类进制转换

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);
         //表示1110在二进制的时候十进制是多少
         int str2=Integer.parseInt("1110",2);
         System.out.println(str2);
         //valueof方法获取一个integer实例
         Integer obj4=Integer.valueOf(500);
         System.out.println(obj4.intValue());
         System.out.println(Integer.valueOf("500").intValue());
         System.out.println(Integer.valueOf("1110",2).intValue());
         //转换为二进制，八进制，十六进制
         System.out.println("15的二进制为"+Integer.toBinaryString(15));
         System.out.println("15的二进制为"+Integer.toOctalString(15));
         System.out.println("15的二进制为"+Integer.toHexString(15));
     }
 }