Java String

Following are the major differences between these 2:

• String is immutable as compared to StringBuffer. You need to create a new instance to replace an object.

Java Code: This is an example of immutable string

//Inefficient version using immutable String
String output = “Some text”
Int count = 100;
for(int I =0; i<count; i++) {
output += i;
}
return output;

• StringBuffer is mutable. Also it is not synchronized.

Java Code: This is an example of mutable string

//More efficient version using mutable StringBuffer
StringBuffer output = new StringBuffer(110);
Output.append(“Some text”);
for(int I =0; i<count; i++) {
output.append(i);
}
return output.toString();