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How to determine whether char is a space in java

王林
Release: 2019-11-28 09:22:39
Original
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How to determine whether char is a space in java

函数介绍:

toCharArray() 方法将字符串转换为字符数组。

语法:

public char[] toCharArray()
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返回值:

字符数组。

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判断思路:

首先通过调用“toCharArray”方法将需要判断的字符串保存到字符数组中,然后使用“for”循环判断字符数组的长度,通过长度的判断来确定“char”是否是空格。

示例如下:

//判断是否char是否为空
import java.util.*;
public class test{ 
 public static void main(String[] args){ 
 String str="abc abc";
 char [] ch=str.toCharArray();
 for(int i=0;i<ch.length;i++) {
     if(Character.isSpace(ch[i])){
         System.out.println("ok");
     }
 } 
 }
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扩展知识:

//判断char是否为空字符串         
  char M=&#39;A&#39;;
            if(M!=&#39;\0&#39;){
                System.out.println("字符M不为空");
            }    
            
            char[] N=new char[1];
            if(N[0]==&#39;\0&#39;)
                System.out.println("字符N[0]为空\n\n\n\n");
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