import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] argv) throws Exception {
Set set1 = new HashSet();
Set set2 = new HashSet();
set1.removeAll(set2);
}
}
Remove element from HashSet in Java
/*w ww.j a va2 s . c o m*/
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class Main {
public static void main(String[] args) {
Set<Integer> set = new HashSet<Integer>();
set.add(new Integer(1));
set.add(new Integer(2));
set.add(new Integer(3));
set.add(new Integer(4));
set.add(new Integer(5));
set.add(new Integer(6));
set.add(new Integer(7));
set.add(new Integer(8));
set.add(new Integer(9));
set.add(new Integer(10));
// Use iterator to display the vsetes
System.out.println("HashSet Before: ");
for (Iterator i = set.iterator(); i.hasNext();) {
Integer integer = (Integer) i.next();
System.out.println(integer);
}
// Remove the integer 6
System.out.println("\nRemove integer 6");
set.remove(new Integer(6));
// Use iterator to display the vsetes
System.out.println("\nHashSet After: ");
for (Iterator i = set.iterator(); i.hasNext();) {
Integer integer = (Integer) i.next();
System.out.println(integer);
}
}
}
运行结果如下:
【set】
