public class PembangunTeks {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();
        System.out.println("Kapasitas awal : " + sb.capacity());

        sb.append("Belajar");
        sb.append(" ");
        sb.append("Java");
        System.out.println("Isi            : " + sb);
        System.out.println("Panjang        : " + sb.length());
        System.out.println("Kapasitas kini : " + sb.capacity());

        sb.insert(8, "bersama ");
        System.out.println("Setelah insert : " + sb);
        System.out.println("Kapasitas tumbuh: " + sb.capacity());

        sb.delete(8, 16);
        System.out.println("Setelah delete : " + sb);

        sb.reverse();
        System.out.println("Setelah reverse: " + sb);

        String hasil = sb.toString();
        System.out.println("toString       : " + hasil);
    }
}