Java如何清除空格？

在Java编程中，如何清除/删除空格？

以下示例演示如何使用Util.regex.Pattern类的matcher.replaceAll(stringname)方法来删除空格。

package com.yiibai;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class RemovingWhitespaces {

    public static void main(String[] argv) {

        String str = "This is a Java program. This is another Java Program.";

        String pattern = "[\\s]";

        String replace = "";

        Pattern p = Pattern.compile(pattern);

        Matcher m = p.matcher(str);

        str = m.replaceAll(replace);

        System.out.println("After Whitespaces trim: "+str);

    }

}

Java

上述代码示例将产生以下结果 -

After Whitespaces trim: ThisisaJavaprogram.ThisisanotherJavaProgram.

Shell

示例-2

以下是删除空格的另一个示例。

package com.yiibai;

import java.util.Scanner ;

import java.lang.String ;

public class RemovingWhitespaces2 {

   public static void main (String[]args) {

      String s1 = null;

      Scanner scan = new Scanner(System.in);

      System.out.println("Enter a new string: ");

      s1 = scan.nextLine();

      System.out.println("Input String is  : "+s1);

      String s2 = s1.replaceAll("\\s+","");

      System.out.println("Output String is  : "+s2);

   }

}

Java

上述代码示例将产生以下结果 -

Enter a new string:

this is a new string with whitespace.

Input String is  : this is a new string with whitespace.

Output String is  : thisisanewstringwithwhitespace.