//Sting Buffer Class
class String2{
public static void main(String[] args){
	StringBuffer sb1=new StringBuffer();
	/*System.out.println(sb1.capacity());
	StringBuffer sb2=new StringBuffer(64);
	System.out.println(sb2.capacity());
	String s = "hello";
	StringBuffer sb3=new StringBuffer(s);
	System.out.println(sb3.capacity());//16+5*/
		boolean b=true;
		sb1.append(b);
		System.out.println(sb1);
		char[] ch={'h','e','l','l','o'};
		/*sb1.append(ch,2,2);
		System.out.println(sb1);
		sb1.delete(2,3);
		System.out.println(sb1);*/
		sb1.getChars(1,3,ch,1);
		System.out.println(ch);
		
		
		
}
}