Showing posts with label arraylist. Show all posts

Saturday, 6 June 2015

How to Convert a TreeSet to ArrayList

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;

public class TreeSetToList {

    public static void main(String[] args) {

           Set<String> ts = new TreeSet<String>();
            ts.add("mumbai");
            ts.add("delhi");
            ts.add("kolkata");
            ts.add("chandigarh");
            ts.add("dehradun");

            // print treeset
            System.out.println(" ts ="+ts);

            List<String> list = new ArrayList<String>(ts);

            for (String str : list) {
                System.out.println(" List Element is = "+str);
            }

        }

}

Output:

ts =[chandigarh, dehradun, delhi, kolkata, mumbai]

List Element is = chandigarh

List Element is = dehradun

List Element is = delhi

List Element is = kolkata

List Element is = mumbai

How to create TreeSet In Java

How to Convert a TreeSet to ArrayList

How to convert array to TreeSet

How to sort TreeSet with user defined objects.

How to copy all element of a Treeset to other

How To Remove Element of Treeset

How to remove all element from TreeSet

How to Remove Set From TreeSet

How To Convert Treeset To Array

How to find does TreeSet contains elements or not

How to count number of element in TreeSet

How to check TreeSet Empty Or not

Saturday, 9 May 2015

Storing Java Object In ArrayList

Now we will make a arraylist of java object. Many times our java application needs to store java object in arraylist . For this firstly we make a arraylist of User type(In this program). Then store object of user in this.

import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListOfObject {

    public static void main(String[] args) {
    ArrayList<User> arr = new ArrayList<User>();
    arr.add(new User("Raja", 20));
    arr.add(new User("Ariseter", 5));
    arr.add(new User("ManSingh",15));

    Iterator<User> itr = arr.iterator();
    while (itr.hasNext()) {
        User user = itr.next();
        System.out.println("Name="+user.getName()+" Age="+user.getAge());
    }

    }

}

class User{
    private String name;
    private int age;

    public User(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

}

Output:

Name=Raja Age=20

Name=Ariseter Age=5

Name=ManSingh Age=15

Create ArrayList In Java

Storing Java Object In ArrayList

How To Copy ArrayList To Array

How to Convert Array to ArrayList

How To Shallow Copy Or Clone a ArrayList

Reverse order of all elements of ArrayList

How to add all elements of a list to ArrayList

Swap elements of Java ArrayList example

Remove All Element From Arraylist Example

how To Remove Element of arraylist

How to Remove List From Arraylist

How to get sub list from ArrayList

How to get element of Arraylist

How to find does ArrayList contains elements or not

How to shuffle elements in ArrayList

How to count number of element in ArrayList

How to replace element in ArrayList

How to insert element in arraylist

How to use retailAll in arraylist

Java Arraylist Examples

Create ArrayList In Java

Storing Java Object In ArrayList

How To Copy ArrayList To Array

How to Convert Array to ArrayList

How To Shallow Copy Or Clone a ArrayList

Reverse order of all elements of ArrayList

How to add all elements of a list to ArrayList

Swap elements of Java ArrayList example

Remove All Element From Arraylist Example

how To Remove Element of arraylist

How to Remove List From Arraylist

How to get sub list from ArrayList

How to get element of Arraylist

How to find does ArrayList contains elements or not

How to shuffle elements in ArrayList

How to count number of element in ArrayList

How to replace element in ArrayList

How to insert element in arraylist

How to use retailAll in arraylist

Thursday, 7 May 2015

How To Create ArrayList In Java

In this program we make a arraylist and add element in it.Here

ArrayList<String> arr = new ArrayList<String>();

String tell that arraylist arr store string type elements.

import java.util.ArrayList;

public class CreateArrayList {

    public static void main(String[] args) {
        ArrayList<String> arr = new ArrayList<String>();
        // add element in arraylist
        arr.add("c");
        arr.add("php");
        arr.add("html");
        arr.add("java");
        // print arraylist
        System.out.println("arrayList is = " + arr);
    }

}

Output:

arrayList is = [c, php, html, java]