Java Integer compareTo()用法及代码示例

java.lang包的Integer类的compareTo()方法以数字方式比较两个Integer对象，如果此Integer等于参数Integer，则返回值0；否则，返回0。如果此Integer在数值上小于参数Integer，则小于0的值；如果此Integer在数值上大于参数Integer(有符号比较)，则该值大于0。

用法:

public int compareTo(Integer anotherInt)
参数：
anotherInt-: the Integer to be compared.
返回：
- This method returns the value 0 if this Integer is 
equal to the argument Integer; 
- a value less than 0 if this Integer is 
numerically less than the argument Integer; 
- and a value greater than 0 if this Integer is
numerically greater than the argument Integer
(signed comparison).

例：展示java.lang.Integer.compareTo()方法的用法。

// Java program to demonstrate working 
// of java.lang.Integer.compareTo() method 
import java.lang.Integer; 
  
class Gfg { 
  
    // driver code 
    public static void main(String args[]) 
    { 
        Integer a = new Integer(10); 
        Integer b = new Integer(20); 
  
        // as 10 less than 20, Output will be a value less than zero 
        System.out.println(a.compareTo(b)); 
  
        Integer x = new Integer(30); 
        Integer y = new Integer(30); 
  
        // as 30 equals 30, Output will be zero 
        System.out.println(x.compareTo(y)); 
  
        Integer w = new Integer(15); 
        Integer z = new Integer(8); 
  
        // as 15 is greater than 8, Output will be a value greater than zero 
        System.out.println(w.compareTo(z)); 
    } 
}

输出：

-1
0
1

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注：本文由纯净天空筛选整理自Niraj_Pandey大神的英文原创作品 Java Integer compareTo() method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。