To delete all whitespaces from a string, use the replaceAll() method and replace every whitespace with empty.
Let’s say the following is our string.
String str = "This is it!";
Now, let us replace the whitespaces that will eventually delete them.
String res = str.replaceAll("\\s+","");
public class Demo { public static void main(String []args) { String str = "This is it!"; System.out.println("String: "+str); String res = str.replaceAll("\\s+",""); System.out.println("String after deleting whitespace: "+res); } }
String: This is it! String after deleting whitespace: Thisisit!