string buffer in java

What is string buffer in java?

Before going to learn about string buffer know about strings.

• The main difference between string and string buffer is string buffer is mutable whereas string is Immutable.

• It means any value assigned to stringBuffer it can be modified in entire execution program

---> StringBuffer is thread-safe i.e., multiple threads can't access simultaneously.So we have to access in an order.It means StringBuffer is Synchronized.

StringBufferDemo program:

public class StringDemo {
    public static void main(String[] args) {
        String a = "one";
        a.concat("two");
        System.out.println(a);

        StringBuffer sb = new StringBuffer("three");
        sb.append("four");
        System.out.println(sb);
    }
}

Output:

string buffer in java

Please comment below to feedback or ask questions.