Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<String> arrayList = new ArrayList<String>();

        arrayList.add("2");
        arrayList.add("2");
        arrayList.add("3");
        arrayList.add("4");
        arrayList.add("5");
        arrayList.add("1");
        arrayList.add("2");

        System.out.println(arrayList.contains("2"));

        int index = arrayList.indexOf("4");
        if (index == -1)
            System.out.println("not contain 4");
        else
            System.out.println("4 at index :" + index);

        int lastIndex = arrayList.lastIndexOf("1");
        if (lastIndex == -1)
            System.out.println("not contain 1");
        else
            System.out.println("Last index :" + lastIndex);
    }
}
/*true
4 at index :3
Last index :5
*/