Java Character compare() 方法

2024 年 11 月 6 日 | 阅读 2 分钟

Character 类的 compare(char x, char y) 方法用于数值比较两个 char 值。返回的值与以下函数返回的值类似：

语法

参数

上述方法需要两个参数

char x，要比较的第一个字符
char y，要比较的第二个字符

返回值

character 类的 compare(char x, char y) 方法返回：

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

示例 1

public class JavaCharacterCompareExample1 {
public static void main(String[] args) {
char firstValue = 'A';
char secondValue = 'B';
// compare the first char to the second
	int compareOneTwo = Character.compare(firstValue, secondValue);
	if (compareOneTwo> 0) {
	System.out.println("First value is greater than second value");
	}
	else {
System.err.println("First value is less than second value.");
	}
   }
}  

输出

First value is less than the second value.

示例 2

public class JavaCharacterCompareExample2{
	public static void main(String[] args) {
char firstValue = '1';
char secondValue = '2';
// compare the first char to the second
	int comp = Character.compare(firstValue, secondValue);
	if (comp< 0) {
	System.err.println("Value 1 is greater than the value 2.");
	}
	else {
	System.err.println("Value 1 is less than the second value2.");
		}
      }
} 

输出

Value 1 is greater than the value 2.

示例 3

public class JavaCharacterCompareExample3 {
public static void main(String[] args) {
	char firstVal = 'J';
	char secondVal ='J';
	char thirdVal = 'M';
// compare the first char to the second CHAR
int compareOneTwo = Character.compare(firstVal, secondVal);
// compare the first char to the third
int compareOneThree = Character.compare(firstVal, thirdVal);
if (compareOneTwo == 0) {
	System.out.println("First and second values are equal.");
	} else if (compareOneTwo> 0) {
	System.out.println("First value is greater than the second value.");
	} else {
	System.out.println("First value is less than the second value.");
	}
	if (compareOneThree == 0) {
	System.out.println("First and third value are equal.");
	}
else if (compareOneTwo> 0) {
	System.out.println("First value is greater than the third value.");
	}
else {
	System.out.println("First value is less than the third value.");
	   }

	}
}

输出

First and second values are equal.
First value is less than the third value.

下一主题Java-character-compareto-method

Java Character compare() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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Java Character compare() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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