Java Character compare()用法及代碼示例

Character 類的 compare(char x, char y) 方法用於對兩個 char 值進行數值比較。返回的最終值類似於以下返回的值：

Character.valueoOf(x).compareTo(Character.valueOf(y))

用法

public static intcompare(char x, char y)

參數

上述方法需要兩個參數：

char x 這是要比較的第一個字符
char y 這是要比較的第二個字符

返回值

字符類的compare(char x, char y)方法返回

如果 x==y，則值為 0
如果 x<y，則值小於 0。
如果 x>y，則值大於 0。

例子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.");
	}
   }
}

輸出：

First value is less than the second value.

例子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.");
		}
      }
}

輸出：

Value 1 is greater than the value 2.

例子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.");
	   }

	}
}

輸出：

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

相關用法

注：本文由純淨天空篩選整理自 Java Character compare() Method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。