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import java.util.ArrayList;

public class Main {
    public static void main(String[] args)  {
        ArrayList<String> objArray = new ArrayList<String>();
        ArrayList<String> objArray2 = new ArrayList<String>();
        objArray2.add(0,"common1");
        objArray2.add(1,"common2");
        objArray2.add(2,"notcommon");
        objArray2.add(3,"notcommon1");
        objArray.add(0,"common1");
        objArray.add(1,"common2");
        System.out.println("objArray elements: " + objArray);
        System.out.println("objArray2 elements: " + objArray2);
        System.out.println("Does objArray contain the string 'common2'? : "
        + objArray.contains("common2"));
        System.out.println("Does objArray2 contain the array objArray? : "
        + objArray2.contains(objArray));
    }
}

objArray elements: [common1, common2]
objArray2 elements: [common1, common2, notcommon, notcommon1]
Does objArray contain the string 'common2'? : true
Does objArray2 contain the array objArray? : false