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concat(), replace(), and trim() Strings in Java.
The concat() method of the String class appends one String to the end of another. The method returns a String with the value of the String passed into the method, appended to the end of the String, used to invoke this method.
Example
public class Test {
public static void main(String args[]) {
String s = "Strings are immutable";
s = s.concat(" all the time");
System.out.println(s);
}
}
Output
Strings are immutable all the time
This replace() method of the String class returns a new string resulting from replacing all occurrences of oldChar in this string with newChar.
Example
public class Test {
public static void main(String args[]) {
String Str = new String("Welcome to Tutorialspoint.com");
System.out.print("Return Value :" );
System.out.println(Str.replace('o', 'T'));
System.out.print("Return Value :" );
System.out.println(Str.replace('l', 'D'));
}
}
Output
Return Value :WelcTme tT TutTrialspTint.cTm Return Value :WeDcome to TutoriaDspoint.com
This trim() method of the String class returns a copy of the string, with leading and trailing whitespace omitted.
Example
import java.io.*;
public class Test {
public static void main(String args[]) {
String Str = new String(" Welcome to Tutorialspoint.com ");
System.out.print("Return Value :" );
System.out.println(Str.trim() );
}
}
Output
Return Value :Welcome to Tutorialspoint.com
Updated on: 2020-02-26T06:27:31+05:30
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