Immutable String In Java

Chapter: String Handling Last Updated: 24-03-2017 04:34:37 UTC

Program:

            /* ............... START ............... */
                
public class JavaImmutableString {

	public static void main(String args[]) {
		String str = "Java";
		str.concat(" Scan");// concat() method appends the string at the end
		System.out.println(str);// will print Sachin because strings are
								// immutable objects
	}
}
                /* ............... END ............... */
        

Output

Java

Notes:

  • In java, string objects are immutable. Immutable simply means unmodifiable or unchangeable.
  • Once string object is created its data or state can't be changed but a new string object is created.
  • There are main three reasons behind for making String in java immutable are:
  • 1. Security Issue
  • 2. String Pool Issue
  • 3. Thread Safe
  • As String is an immutable object, it can be accessed by multiple threads and no thread can change the value of the particular object. So String objects are thread-safe and can be shared with multithreading environment.

Tags

Immutable String, Java, String

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