Java Character isWhitespace()方法
java.lang.Character.isWhitespace(char ch) 确定指定的字符是否为Java空白。字符是一个Java空白字符,当且仅当它满足下列条件之一:
-
它是一个Unicode字符空格 (SPACE_SEPARATOR, LINE_SEPARATOR, or PARAGRAPH_SEPARATOR) 但不也是非间断空格('u00A0', 'u2007', 'u202F').
-
它是 ' ', U+0009 HORIZONTAL TABULATION.
-
它是 ' ', U+000A LINE FEED.
-
它是 'u000B', U+000B VERTICAL TABULATION.
-
它是 'f', U+000C FORM FEED.
-
它是 ' ', U+000D CARRIAGE RETURN.
-
它是 'u001C', U+001C FILE SEPARATOR.
-
它是 'u001D', U+001D GROUP SEPARATOR.
-
它是 'u001E', U+001E RECORD SEPARATOR.
-
它是 'u001F', U+001F UNIT SEPARATOR.
1 语法
public static boolean isWhitespace(char ch)
2 参数
ch:要测试字符
3 返回值
如果字符是一个Java空白字符此方法返回true,否则返回false。
4 示例
package com.yiidian;
/**
* 一点教程网: http://www.yiidian.com
*/
/**
* Java Character isWhitespace()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 = ' ';
ch2 = 'f';
// create 2 boolean primitives b1, b2
boolean b1, b2;
/**
* check if ch1, ch2 are whitespace characters and
* assign results to b1, b2
*/
b1 = Character.isWhitespace(ch1);
b2 = Character.isWhitespace(ch2);
String str1 = "ch1 is a Java whitespace character is " + b1;
String str2 = "ch2 is a Java whitespace character is " + b2;
// print b1, b2 values
System.out.println( str1 );
System.out.println( str2 );
}
}
输出结果为:
ch1 is a Java whitespace character is true
ch2 is a Java whitespace character is true
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