public TestCollectionSequence()
{
// arrayList
arrayList = new ArrayList();
System.out.println("Add elements into arrayList");
for(int i = 0; i < 15; i++)
{
Integer r = new Integer((int)(Math.random()*15));
arrayList.add(r);
System.out.print(r + " ");
}
System.out.println("\nThe elements in arrayList is : ");
System.out.println(arrayList);
System.out.println("\n");
//linkedList
linkedList = new LinkedList();
System.out.println("Add elements into linkedList");
for(int i = 0; i < 15; i++)
{
Integer r = new Integer((int)(Math.random()*15));
linkedList.add(r);
System.out.print(r + " ");
}
System.out.println("\nThe elements in linkedList is : ");
System.out.println(linkedList);
System.out.println("\n");
// hashSet
hashSet = new HashSet();
System.out.println("Add elements into hashSet");
for(int i = 0; i < 15; i++)
{
Integer r = new Integer((int)(Math.random()*15));
if(hashSet.add(r))
System.out.print(r + " ");
}
System.out.println("\nThe elements in hashSet is : ");
System.out.println(hashSet);
System.out.println("\n");
//
treeSet = new TreeSet();
System.out.println("Add elements into treeSet");
for(int i = 0; i < 15; i++)
{
Integer r = new Integer((int)(Math.random()*15));
if(treeSet.add(r))
System.out.print(r + " ");
}
System.out.println("\nThe elements in treeSet is : ");
System.out.println(treeSet);
System.out.println("\n");
//hashMap
hashMap = new HashMap();
System.out.println("Add elements into hashMap");
for(int i = 0; i < 15; i++)
{
Integer r = new Integer((int)(Math.random()*15));
System.out.print(r + " ");
hashMap.put(new Integer(i), r);
}
System.out.println("\nThe elements in hashMap is : ");
System.out.println(hashMap);
System.out.println("\n");
//treeMap
treeMap = new TreeMap();
System.out.println("Add elements into treeMap");
for(int i = 0; i < 15; i++)
{
Integer r = new Integer((int)(Math.random()*15));
System.out.print(r + " ");
treeMap.put(new Integer(i), r);
}
System.out.println("\nThe elements in treeMap is : ");
System.out.println(treeMap);
}
public static void main(String[] args)
{
TestCollectionSequence test = new TestCollectionSequence();
}
}