Java Integer compareUnsigned() 方法

2025 年 3 月 25 日 | 阅读 3 分钟

compareUnsigned() 是 Java Integer 类的一个方法，它将两个整数对象视为无符号值进行比较。如果两个参数相等，则返回 0；如果第一个参数小于第二个参数，则返回一个小于 0 的值；如果第一个参数大于第二个参数，则返回一个大于 0 的值。此方法由 Comparable<Integer> 接口指定。

注意：此方法不能与不同类型的参数进行比较，因此参数和数字应为相同类型。

语法

以下是 **compareUnsigned()** 方法的声明

参数

数据类型	参数	描述	必需/可选
int	x	要比较的第一个 int 值	必需
int	y	要比较的第二个 int 值	必需

返回值

compareUnsigned(int x, int y) 方法将返回以下值：

0 = 如果 x=y，则返回 0；
-1 = 如果 x < y，则返回一个小于 0 的值；
1 = 如果 x > y，则返回一个大于 0 的值；

异常

不适用

兼容版本

Java 1.8 及以上版本

示例 1

public class IntegerCompareUnsignedExample1 {
	public static void main(String[] args) {
		int a = 55;
		int b = 55;
		int c = 110;
		int d = 150;
		int n = -8;		 
		//output is zero, since a==b
		System.out.println("Output: "+Integer.compareUnsigned(a, b));
		//output is less than zero, since a<c
		System.out.println("Output: "+Integer.compareUnsigned(a, c));
		//output is greater than zero, since d>c
		System.out.println("Output: "+Integer.compareUnsigned(d, c));
           //As 55 is greater than -8,but -8 will be treated as an unsigned number
	      //which will be greater than 55 Output will be a value less than zero
		System.out.println("Output: "+Integer.compareUnsigned(b, n));
		}
}

输出

Output: 0
Output: -1
Output: 1
Output: -1

示例 2

public class IntegerCompareUnsignedExample2 {
		public static void main(String[] args) {
			//compares two Integer values numerically
		      Integer x = 98;
		      Integer y= -8;
		      int retResult =  Integer.compareUnsigned(x,y);	    
		      if(retResult > 0) {
		         System.out.println("x is greater than y");
		      } else if(retResult< 0) {
		         System.out.println("x is less than y");
		      } else {
		         System.out.println("x is equal to y");
		      }
		}
}

输出

x is greater than y

示例 3

import java.util.Scanner;
public class IntegerCompareUnsignedExample3 {
		public static void main(String[] args) {
			//Ask the input from user
			System.out.print("Enter the first value: ");				
			Scanner sc = new Scanner(System.in);					
			int val1 = sc.nextInt();							
			System.out.print("Enter the second value: ");
			int val2 = sc.nextInt();			
			// compare the two user input (unsigned value)
			int result = Integer.compareUnsigned(val1, val2);			
			// Print the output
			if(result == 0){
				System.out.println("They are equal");
			}else if(result > 0){
				System.out.println("First Value is greater than the second value.");			
			}else{
				System.out.println("First Value is less than the second value.");			
			}		
			sc.close();
		      }
}

输出

Enter the first value: -45
Enter the second value: 65
First Value is greater than the second value.

示例 4

import java.util.Scanner;
public class IntegerCompareUnsignedExample4 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
            System.out.println("Campare the user inputs (unsigned integer): ");	
            Integer val1 = sc.nextInt();
            Integer val2 = sc.nextInt();
            Integer val3 = sc.nextInt();
            sc.close();
            System.out.println("The Results are: ");
            System.out.println(Integer.compareUnsigned(val1,val2));
            System.out.println(Integer.compareUnsigned(val1,val3));
            System.out.println(Integer.compareUnsigned(val3,val2));
		}
}

输出

Campare the user inputs (unsigned integer): 
-44
-44
88
The Results are: 
0
1
-1

下一主题Java-integer-decode-method

Java Integer compareUnsigned() 方法

注意：此方法不能与不同类型的参数进行比较，因此参数和数字应为相同类型。

语法

参数

返回值

异常

兼容版本

示例 1

示例 2

示例 3

示例 4

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Java Integer compareUnsigned() 方法

注意：此方法不能与不同类型的参数进行比较，因此参数和数字应为相同类型。

语法

参数

返回值

异常

兼容版本

示例 1

示例 2

示例 3

示例 4

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