Java Character isLowerCase()方法

java.lang.Character.isLowerCase(char ch) 确定指定的字符是否为小写字母。

字符是小写如果是一般性类型,Character.getType(ch)所提供为LOWERCASE_LETTER,或为属性Other_Lowercase Unicode的标准定义。

1 语法

public static boolean isLowerCase(char ch)

2 参数

ch:要测试的字符

3 返回值

如果字符是小写此方法返回true,否则返回false。

4 示例 

package com.yiidian;

/**
 * 一点教程网: http://www.yiidian.com
 */
/**
 * Java Character isLowerCase()方法
 */
import java.lang.*;

public class CharacterDemo {

   public static void main(String[] args) {

      // create 2 char primitives ch1, ch2
      char ch1, ch2;

      // assign values to ch1, ch2
      ch1 = 'A';
      ch2 = 'a';

      // create 2 boolean primitives b1, b2
      boolean b1, b2;

      // check if ch1, ch2 are in lowercase and assign results to b1, b2
      b1 = Character.isLowerCase(ch1);
      b2 = Character.isLowerCase(ch2);

      String str1 = ch1 + " is a lowercase character is " + b1;
      String str2 = ch2 + " is a lowercase character is " + b2;

      // print b1, b2 values
      System.out.println( str1 );
      System.out.println( str2 );
   }
}

输出结果为:

A is a lowercase character is false
a is a lowercase character is true

 

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