How to remove spaces in a string in Java

This article will explain in detail how to remove the spaces in the string in Java. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have some understanding of the relevant knowledge after reading this article.

Remove space\ t, carriage return\ n, newline character\ r, tab character\ t from the string

Public class StringUtils {public static void main (String [] args) {String billNo= "123\ n"; String billNo1= "123\ n"; String billNo2= "123\ n"; String billNo3= "123\ n"; System.out.print (billNo+ "|" + delSpace (billNo) + "|" + replaceBlank (billNo1) + "|" + "|" + replaceBlank2 (billNo2) + "|"); System.out.print (billNo3.trim ()) System.out.print (billNo3.replaceAll ("", "));} / * * use Java regular expressions to remove spaces * @ param str * @ return * / public static String delSpace (String str) {if (str==null) return null; String regStartSpace=" ^ [] * "; String regEndSpace=" [] * $" String strDelSpace= str.replaceAll (regStartSpace, "") .replaceAll (regEndSpace, "); return strDelSpace;} public static String replaceBlank (String str) {String destStr="; if (str! = null) {/ / where\ s can match blank characters such as spaces, tabs, line feeds, Pattern p = Pattern.compile ("\\ s * |\ t |\ r |\ n") Matcher m = p.matcher (str); destStr=m.replaceAll ("");} return destStr;} public static String replaceBlank2 (String str) {String destStr= "; if (str! = null) {Pattern p = Pattern.compile (" [\\ s * |\ t |\ n] * $"); Matcher m = p.matcher (str) DestStr=m.replaceAll ("");} return destStr;}} this is the end of sharing about how to remove the spaces in the string in Java. I hope the above content can be helpful to you and learn more. If you think the article is good, you can share it for more people to see.