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FirstProgram.java

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package StringBuilders;

public class FirstProgram {

public static void main(String[] args) {

// declare string builder

StringBuilder sb = new StringBuilder("Prity");

System.out.println(sb);

//get a character at any index using .charAt() function

System.out.println(sb.charAt(0));

//set a character at any index using .setCharAt() function

sb.setCharAt(0, 'K');

System.out.println(sb);

//insert some charecter in the string at any index using .insert(indexNumber, insertedCharacter) function

sb.insert(0, 'A');

System.out.println(sb);

// delete the character in the string at any index using .delete(startIndexNumber, endIndexNumber)function

// first value : jhan se delete start karna h

// second value : jhan tak delete karna hai

sb.delete(0, 1);

System.out.println(sb);

//add some character in the string at ending position using .append()function

// ya ise append bhi kahte hain means add something at the end

sb.append("S"); //str = str + "S";

sb.append("i"); //str = str + "i";

sb.append("n"); //str = str + "n";

sb.append("g"); //str = str + "g";

sb.append("h"); //str = str + "h";

System.out.println(sb);

// find length of string using .length() function

System.out.println(sb.length());

}

}

//output

/*

Prity

P

Krity

AKrity

Krity

KritySingh

10 */