Mega Code Archive
Retaining Another Collection
<![CDATA[
Only those elements within the collection argument are kept within the vector.
Everything else is removed instead.
import java.util.Vector;
public class MainClass {
public static void main(String args[]) {
Vector v = new Vector(5);
for (int i = 0; i < 10; i++) {
v.add(0,i);
}
System.out.println(v);
Vector v2 = new Vector(5);
for (int i = 0; i < 5; i++) {
v2.add(0,i);
}
System.out.println(v2);
System.out.println(v2.equals(v));
v.retainAll(v2);
System.out.println(v);
}
}
[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
[4, 3, 2, 1, 0]
false
[4, 3, 2, 1, 0]
]]>