Difference between StringBuffer and StringBuilder
There are many differences between StringBuffer and StringBuilder. A list of differences between StringBuffer and StringBuilder are given below:
|
No. |
StringBuffer |
StringBuilder |
|
1) |
StringBuffer is synchronized i.e. thread safe. It means two threads can't call the methods of StringBuffer simultaneously. |
StringBuilder is non-synchronized i.e. not thread safe. It means two threads can call the methods of StringBuilder simultaneously. |
|
2) |
StringBuffer is less efficient than StringBuilder. |
StringBuilder is more efficient than StringBuffer. |
StringBuffer Example
public class BufferTest{
public static void main(String[] args){
StringBuffer buffer=new StringBuffer("hello");
buffer.append("java");
System.out.println(buffer);
}
}
hellojava
StringBuilder Example
public class BuilderTest{
public static void main(String[] args){
StringBuilder builder=new StringBuilder("hello");
builder.append("java");
System.out.println(builder);
}
}
hellojava
Performance Test of StringBuffer and StringBuilder
Let's see the code to check the performance of StringBuffer and StringBuilder classes.
public class ConcatTest{
public static void main(String[] args){
long startTime = System.currentTimeMillis();
StringBuffer sb = new StringBuffer("Java");
for (int i=0; i<10000; i++){
sb.append("Tpoint");
}
System.out.println("Time taken by StringBuffer: " + (System.currentTimeMillis() - startTime) + "ms");
startTime = System.currentTimeMillis();
StringBuilder sb2 = new StringBuilder("Java");
for (int i=0; i<10000; i++){
sb2.append("Tpoint");
}
System.out.println("Time taken by StringBuilder: " + (System.currentTimeMillis() - startTime) + "ms");
}
}
Time taken by StringBuffer: 16ms
Time taken by StringBuilder: 0ms