Java Character isAlphabetic()用法及代码示例

Character 类的 isAlphabetic(intcodePoint) 方法确定指定字符是否为字母表。

如果字符具有以下特征，则将其视为字母表：

大写_字母
LOWERCASE_LETTER
TITLECASE_LETTER
MODIFIER_LETTER
OTHER_LETTER
LETTER_NUMBER 或
Unicode 标准定义的其他字母表。

用法

public static Boolean isAlphabetic(int codePoint)

参数

codePoint: 这是要测试的字符。

返回值

如果字符是 Unicode 字母字符，则 isAlphabetic(intcodePoint) 方法返回 true。否则，此方法返回 false。

例子1

public class JavaCharacterisAlphabeticExample1 {	
    public static void main(String[] args) {
    char codepoint1 = '0';
    char codepoint2 = '1';
    boolean b1 = Character.isAlphabetic(codepoint1);
    boolean b2 = Character.isAlphabetic(codepoint2);  
    System.out.println("The returned value for the first character is given as:"+"   "+b1);
    System.out.println("The returned value for the first character is given as:"+"   "+b2);
    
        }
    }

输出：

The returned value for the first character is given as:  false
The returned value for the first character is given as:  false

例子2

public class JavaCharacterisAlphabeticExample2 {
public static void main(String[] args) {	
    // Initialize the codepoints
    int codepoint1 = 87;
int codepoint2 = 49;
    int codepoint3 = 63;
    // Check if the first codepoint is alphabet or not.
boolean checkAlp1 = Character.isAlphabetic(codepoint1);
    if(checkAlp1){
    System.err.print("Codepoint \'"+codepoint1+"\' is an alphabet.\n");
        }
    else{
    System.out.print("Codepoint \'"+codepoint1+"\' is not an alphabet.\n");
        }
    // Check if the second codepoint is alphabet or not.
    boolean checkAlp2 = Character.isAlphabetic(codepoint2);
    if(checkAlp2){
    System.err.print("Codepoint \'"+codepoint2+"\' is an alphabet.\n");
        }
    else{
    System.out.print("Codepoint \'"+codepoint2+"\' is not an alphabet.\n");
        }
    // Check if the third codepoint is alphabet or not.
    boolean checkAlp3  = Character.isAlphabetic(codepoint3);
    if(checkAlp3){
System.err.print("Codepoint \'"+codepoint3+"\' is an alphabet.\n");
        }
    else{
    System.out.print("Codepoint \'"+codepoint3+"\' is not an alphabet.\n");
        }		
    }
}

输出：

Codepoint '87' is an alphabet.
Codepoint '49' is not an alphabet.
Codepoint '63' is not an alphabet.

例子3

public class JavaCharacterisAlphabeticExample3 {	
    public static void main(String[] args) {
    char codepoint1 = '1';
    char codepoint2 = 'A';
    char codepoint3  ='B';
    boolean b1 = Character.isAlphabetic(codepoint1);
    boolean b2 = Character.isAlphabetic(codepoint2);
    boolean b3 = Character.isAlphabetic(codepoint3);
    System.out.println("The returned value for the first character is given as:"+"   "+b1);
    System.out.println("The returned value for the second character is given as:"+"  "+b2);
    System.out.println("The returned value for the third character is given as:"+"   "+b3);	
        }
}

输出：

The returned value for the first character is given as:  false
The returned value for the second character is given as: true
The returned value for the third character is given as:  true

相关用法

注：本文由纯净天空筛选整理自 Java Character isAlphabetic() 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。