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Program: Basic Vector Operations.
Description: |
Below example shows how to create vector object, adding elements to it, getting elements by
specifying index, getting elements index, getting first element, getting last element, and is vector is empty or not.
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Code: |
package com.java2novice.vector;
import java.util.Vector;
public class BasicVectorOperations {
public static void main(String a[]){
Vector<String> vct = new Vector<String>();
//adding elements to the end
vct.add("First");
vct.add("Second");
vct.add("Third");
System.out.println(vct);
//adding element at specified index
vct.add(2,"Random");
System.out.println(vct);
//getting elements by index
System.out.println("Element at index 3 is: "+vct.get(3));
//getting first element
System.out.println("The first element of this vector is: "+vct.firstElement());
//getting last element
System.out.println("The last element of this vector is: "+vct.lastElement());
//how to check vector is empty or not
System.out.println("Is this vector empty? "+vct.isEmpty());
}
}
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Output: |
[First, Second, Third]
[First, Second, Random, Third]
Element at index 3 is: Third
The first element of this vector is: First
The last element of this vector is: Third
Is this vector empty? false
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List Of All Vector Sample Programs:- Basic Vector Operations.
- How to read all elements in vector by using iterator?
- How to read all elements in vector by using Enumeration?
- How to copy or clone a vector?
- How to add all elements of a list to vector?
- How to delete all elements from my vector?
- How to find does vector contains all list elements or not?
- How to copy vector to array?
- How to get sub list from vector?
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Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object
according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that
determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float,
double, boolean, char.
I respect faith, but doubt is what gets you an education.
-- Wilson Mizner
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