Java String replaceAll() method
Java String replaceAll() method returns a String replacing all the sequence of characters matching regular expression i.e regex and replacement string.
Syntax:
public String replaceAll(String regex, String replacement)
Parameters:
regex : regular expression
replacement : replacement sequence of characters
Returns:
a new String i.e. replaced String
Java String replaceAll() example 1: replace character
public class JavaStringReplaceAllEx1 { public static void main(String args[]) { String s1="W3lcom3 to the TutorialsAndExampl3"; String replaceString=s1.replaceAll("3","e"); System.out.println(replaceString); } }
Output:
Welcome to the TutorialsAndExample
Java String replaceAll() example 2: replace word
public class JavaStringReplaceAllEx2 { public static void main(String args[]) { String s1="Welcome to rock TutorialAndExample"; String replaceString=s1.replaceAll("rock","the");//replaces all occurrences of "rock" to "the" System.out.println(replaceString); } }
Output:
Welcome to the TutorialAndExample
Java String replaceAll() example 3
public class JavaStringReplaceEx3 { public static void main(String[] args) { String str = "JABA IS THE BEST"; String rs = str.replaceAll("JABA","JAVA"); System.out.println(rs); String str1 = rs.concat(" PROGRAMMING LANGUAGE"); System.out.println(str1); String rs2 = str1.replaceAll("THE BEST","A OBJECT ORIENTED"); System.out.println(rs2); } }
Output:
JAVA IS THE BEST JAVA IS THE BEST PROGRAMMING LANGUAGE JAVA IS A OBJECT ORIENTED PROGRAMMING LANGUAGE
Java String replaceAll() example 4: remove white spaces
public class JavaStringReplaceAllEx4 { public static void main(String args[]) { String s1="tutorial and example .com"; String replaceString=s1.replaceAll("\\s",""); System.out.println(replaceString); } }
Output:
tutorialandexample.com