stringBuilder.java

// Java code to illustrate StringBuilder

import java.util.*;
import java.util.concurrent.LinkedBlockingQueue;

public class GFG1 {
	public static void main(String[] argv)
		throws Exception
	{

		// create a StringBuilder object
		// usind StringBuilder() constructor
		StringBuilder str
			= new StringBuilder();

		str.append("GFG");

		// print string
		System.out.println("String = "
						+ str.toString());

		// create a StringBuilder object
		// usind StringBuilder(CharSequence) constructor
		StringBuilder str1
			= new StringBuilder("AAAABBBCCCC");

		// print string
		System.out.println("String1 = "
						+ str1.toString());

		// create a StringBuilder object
		// usind StringBuilder(capacity) constructor
		StringBuilder str2
			= new StringBuilder(10);

		// print string
		System.out.println("String2 capacity = "
						+ str2.capacity());

		// create a StringBuilder object
		// usind StringBuilder(String) constructor
		StringBuilder str3
			= new StringBuilder(str1.toString());

		// print string
		System.out.println("String3 = "
						+ str3.toString());
	}
}