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));


}
}

运行结果