Java Example: Modify Strings with StringBuilder http://www.chankok.com/java-modify-strings-with-stringbuilder/

StringBuilderExample.java

public class StringBuilderExample {

    public static void main(String[] args) {
    
        StringBuilder sb = new StringBuilder();

        // Append strings
        sb.append("Welcome").append(' ').append("to").append(' ').append("Chankok.com");
        System.out.println("Append strings   : " + sb.toString());

        // Insert Strings
        sb.insert(11, "Java world and ");
        System.out.println("Insert strings   : " + sb.toString());

        // Replace character and strings
        sb.setCharAt(16, 'W');
        System.out.println("Replace character: " + sb.toString());

        sb.replace(16, 21, "blog");
        System.out.println("Replace strings  : " + sb.toString());

        // Delete character and strings
        sb.deleteCharAt(11);
        System.out.println("Delete character : " + sb.toString());

        sb.delete(11, 24);
        System.out.println("Delete strings   : " + sb.toString());

        sb.setLength(0);
        System.out.println("Empty strings    : " + sb.toString());

        // Reverse strings
        sb.append("Welcome to Chankok.com");
        sb.reverse();
        System.out.println("Reverse strings  : " + sb.toString());

    }

}