Java Collections Program

Write  for Collections.checkedSet() method

package com.java2novice.collections;

import java.util.Collections;

import java.util.HashSet;

import java.util.Set;

public class MyCheckedSet

{

public static void main(String a[])

{

         

        Set mySet = new HashSet();

        mySet.add("one");

        mySet.add("two");

        mySet.add("three");

        mySet.add("four");

        Set chkSet = Collections.checkedSet(mySet, String.class);

        System.out.println("Checked set content: "+chkSet);

        mySet.add(10);

        chkSet.add(10);

    }

}

Write  for Collections.checkedMap() method

package com.java2novice.collections;

import java.util.Collections;

import java.util.HashMap;

import java.util.Map;

public class MyCheckedMap

{

public static void main(String a[])

{

        Map myMap = new HashMap();

        myMap.put("one", 1);

        myMap.put("two", 2);

        myMap.put("three", 3);

        myMap.put("four", 4);

        Map chkMap = Collections.checkedMap(myMap, String.class, Integer.class);

        System.out.println("Checked map content: "+chkMap);

        myMap.put(10, "ten");

       chkMap.put(10, "ten"); //throws ClassCastException

    }

}

How to check there in no common element between two list objects by using Collections.disjoint() method

package com.java2novice.collections;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class MyListDisjoint

{

public static void main(String a[])

{

        List sl = new ArrayList();

        sl.add("apple");

        sl.add("java");

        sl.add("c++");

        sl.add("unix");

        sl.add("orange");

        sl.add("airtel");

        List tl = new ArrayList();

        tl.add("job");

        tl.add("oracle");

        tl.add("jungle");

        tl.add("cricket");

        boolean isCommon = Collections.disjoint(sl,tl);

        System.out.println("Does not found any common elements? "+isCommon);

        tl.add("java");

        isCommon = Collections.disjoint(sl,tl);

        System.out.println("Does not found any common elements? "+isCommon);

    }

}