In this post, we will see difference between StringBuffer and StringBuilder in java
StringBuffer vs StringBuilder
|
Parameter
|
StringBuffer
|
StringBuilder
|
|---|---|---|
|
Thread-safe
|
StringBuffer is thread safe. Two threads can not call methods of StringBuffer simultaneously.
|
StringBuilder is not thread safe, so two threads can call methods of StringBuilder simultaneously.
|
|
Performance
|
It is less performance efficient as it is thread-safe |
It is more performance efficient as it is not thread-safe.
|
Performance comparison between StringBuffer and StringBuilder in single thread environment
package org.arpit.java2blog;
public class StringBuilderAndBufferMainTest {
public static void main(String[] args) {
long startTime = System.currentTimeMillis();
StringBuffer sb = new StringBuffer("Java");
for (int i=0; i<100000; i++){
sb.append("2Blog");
}
System.out.println("Time taken by StringBuffer: " + (System.currentTimeMillis() - startTime) + "ms");
startTime = System.currentTimeMillis();
StringBuilder sbuilder = new StringBuilder("Java");
for (int i=0; i<100000; i++){
sbuilder.append("2Blog");
}
System.out.println("Time taken by StringBuilder: " + (System.currentTimeMillis() - startTime) + "ms");
}
}
When you run above program, you may get below output:
Time taken by StringBuffer: 21ms Time taken by StringBuilder: 9ms
You can go through core java interview questions for more such questions.
