Java ArrayList .retainAll ( Collection <?> c)
Syntax
ArrayList.retainAll(Collection <?> c) has the following syntax.
public boolean retainAll(Collection <?> c)
Example
In the following code shows how to use ArrayList.retainAll(Collection <?> c) method.
//ww w . j a va2s . co m
import java.util.ArrayList;
public class Main {
public static void main(String args[]) {
ArrayList<Integer> arrlist = new ArrayList<Integer> ();
arrlist.add(1);
arrlist.add(2);
arrlist.add(3);
arrlist.add(4);
arrlist.add(5);
ArrayList<Integer> arrlist2 = new ArrayList<Integer> ();
arrlist2.add(1);
arrlist2.add(2);
arrlist2.add(3);
arrlist.retainAll(arrlist2);
System.out.println(arrlist);
}
}
The code above generates the following result.
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