Java String replace() method explained | technical-arbaab

Java string replace() method explained

It is a predefined function which is present in the Java.lang.String package. It is used to replace a character or sequence of characters with the new character or sequence of characters. It is of two types let's discuss each of them in detail-

Types of replace() methods of String class

 public String replace(CharSequence target, CharSequence replacement) {}  
 public String replace(char oldChar, char newChar) {}  

1. replace(CharSequence target, CharSequence replacement): This method takes the target string(string you want to change) and replacement string(by which you will change your target string) and replace the target string with the replacement string and then returns the resulted string let's see it's implementation-

Example 01 of replace(CharSequence target, CharSequence replacement) function

 public class Replace {  
      public static void main(String a[]) {    //it is your choice to give parameter like this  
           String s = new String("marvel");  
           System.out.println(s.replace("m","b"));  
      }  
 }  

Output:

 barvel  

Example 02 of replace(CharSequence target, CharSequence replacement) function

 public class Replace {  
      public static void main(String a[]) {//it is your choice to give parameter like this  
           String s = new String("The falcon and the winter soldier finally released");  
           System.out.println(s.replace("l","t"));  
           //replace all occurences of l with t in a string  
      }  
 }  

Output:

 The fatcon and the winter sotdier finatty reteased  

2. replace(char oldChar, char newChar): This method takes the first parameter, the character which is to be replaced and the second parameter takes the character by which you will replace the old character, let's see it's implementation-

Example 01 of replace(char oldChar, char newChar) function

 public class Replace {  
      public static void main(String a[]) {//it is your choice to give parameter like this  
           String s = new String("marvel movies are awesome");  
           System.out.println(s.replace('m','b'));  
           //replace all occurences of m with b in a string  
      }  
 }  

Output:

 barvel bovies are awesobe  

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