package pkjsb;

import java.util.*;

public class TestStringBuilder {

    public TestStringBuilder(){

        String name;
        name = "Mike";
        name += "Mamba";
        name += 10;

        name = name.substring(4, name.length());
        System.out.println(name);

        StringBuilder str = new StringBuilder();
        str.append("Mike");
        str.append("Mamba");
        str.append(10);

        str.delete(0, 4);
        System.out.println(str);
    }

}