Java Vector Pro

Shuffle elements of Java Vector

import java.util.Vector;

import java.util.Collections;

public class ShuffleElementsOfVectorExample

{

public static void main(String[] args)

{

Vector v = new Vector();

v.add("1");

v.add("2");

v.add("3");

v.add("4");

v.add("5");

System.out.println("Before shuffling, Vector contains : " + v);

Collections.shuffle(v);

System.out.println("After shuffling, Vector contains : " + v);

   

    }

}

Swap elements of Java Array List

import java.util.ArrayList;

import java.util.Collections;

public class SwapElementsOfArrayListExample

{

public static void main(String[] args)

{

ArrayList arrayList = new ArrayList();

arrayList.add("A");

arrayList.add("B");

arrayList.add("C");

arrayList.add("D");

arrayList.add("E");

System.out.println("Before swaping, ArrayList contains : " + arrayList);

Collections.swap(arrayList,0,4);

System.out.println("After swaping, ArrayList contains : " + arrayList);

    }

}

Swap elements of Java Vector

import java.util.Vector;

import java.util.Collections;

public class SwapElementsOfVectorExample

{

public static void main(String[] args)

{

Vector v = new Vector();

v.add("1");

v.add("2");

v.add("3");

v.add("4");

v.add("5");

    

System.out.println("Before swaping, Vector contains : " + v);

Collections.swap(v,0,4);

System.out.println("After swaping, Vector contains : " + v);

   }

}

Sort Java Array List in descending order using comparator

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

public class SortArrayListInDescendingOrderExample

{

public static void main(String[] args)

{

ArrayList arrayList = new ArrayList();

arrayList.add("A");

arrayList.add("B");

arrayList.add("C");

arrayList.add("D");

arrayList.add("E");

Comparator comparator = Collections.reverseOrder();

System.out.println("Before sorting ArrayList in descending order : "

+ arrayList);

Collections.sort(arrayList,comparator);

System.out.println("After sorting ArrayList in descending order : "

+ arrayList);

    }

}

Sort Java Vector in descending order using comparator

import java.util.Vector;

import java.util.Collections;

import java.util.Comparator;  

public class SortVectorInDescendingOrderExample

{

public static void main(String[] args)

{

Vector v = new Vector();

v.add("1");

v.add("2");

v.add("3");

v.add("4");

v.add("5");

Comparator comparator = Collections.reverseOrder();

System.out.println("Before sorting Vector in descending order : " + v);

Collections.sort(v,comparator);

System.out.println("After sorting Vector in descending order : " + v);

   }

}

Sort elements of Java Array List

import java.util.ArrayList;

import java.util.Collections;

public class SortJavaArrayListExample

{

 public static void main(String[] args)

 {

ArrayList arrayList = new ArrayList();

arrayList.add("1");

arrayList.add("3");

arrayList.add("5");

arrayList.add("2");

arrayList.add("4");

Collections.sort(arrayList);

System.out.println("ArrayList elements after sorting in ascending order : ");

for(int i=0; i

System.out.println(arrayList.get(i));

  }

}

Reverse order of all elements of Java Array List

import java.util.ArrayList;

import java.util.Collections;

public class ReverseOrderArrayListExample

{

public static void main(String[] args)

{

ArrayList arrayList = new ArrayList();

arrayList.add("A");

arrayList.add("B");

arrayList.add("C");

arrayList.add("D");

arrayList.add("E");

System.out.println("Before Reverse Order, ArrayList Contains : " + arrayList);

Collections.reverse(arrayList);

System.out.println("After Reverse Order, ArrayList Contains : " + arrayList);

    }

}