How to Optimize Java String Creation

by Online Tutorials Library July 22, 2022

How to optimize string creation?

By using string literals.

Ex:

File: StringPerformance .java

  public class StringPerformance {  public static void main(String[] args) {  long startTime = System.currentTimeMillis();     for (int i = 0; i < 100000; i++) {  String str1 = “India”;  String str2= “India”;  }  long endTime = System.currentTimeMillis();  System.out.println(“Time taken to create literal String : “+ (endTime – startTime) + ” ms”);  long startTime1 = System.currentTimeMillis();     for (int i = 0; i < 100000; i++) {  String str1 = new String(“India”);  String str2 = new String(“India”);  }  long endTime1 = System.currentTimeMillis();  System.out.println(“Time taken to create Object String : ” + (endTime1 – startTime1) + ” ms”);  }  }  

Output:

Time taken to create literal String : 9 ms  Time taken to create Object String : 11 ms

Hence, String creation using literals take less time.

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