How to sort a vector elements that contains the user define
class object? (Note: If Suppose consider, A Student class
contain two data members. They are String studentName and
int rollNo. I am creating Four objects for this class, each
object contains students details like name and roll no. Now
i am storing that objects in vector and if i retiving the
elements from the vector means then it should be display in
sorting order)

Answer Posted / vignesh_27

Hai The solution for this problem is.

import java.util.Collections;
import java.util.Vector;

class PointCoordinates {
private String x;
private int y;
public PointCoordinates(String x, int y) {
this.x = x;
this.y = y;
}
public String getX() {
return x;
}
public int getY() {
return y;
}
// Custom toString() Method.
public String toString() {
return x + " " + y;
}
}
public class ToStringFunction {
public static void main(String args[]) {
Vector v = new Vector();

PointCoordinates point1 = new
PointCoordinates("Rajan", 10);
PointCoordinates point2 = new
PointCoordinates("Vikky", 30);
PointCoordinates point3 = new
PointCoordinates("Zari",20);
PointCoordinates point4 = new
PointCoordinates("Ajai",80);
PointCoordinates point5 = new
PointCoordinates("Kennedi", 90);
v.addElement(point1.toString());
v.addElement(point2.toString());
v.addElement(point3.toString());
v.addElement(point4.toString());
v.addElement(point5.toString());
Collections.sort(v);
for(int i=0;i<v.size();i++)
System.out.println(v.get(i));


}
}

Is This Answer Correct ?    10 Yes 9 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Is a case study a method or methodology?

668


What is the difference between a switch statement and an if statement?

781


Can we execute a program without main?

764


Are there structures in java?

747


What are the advantages of arraylist over arrays?

817


How do you define a parameter?

807


What is charat ()?

734


What is the difference between hashset and treeset in java?

792


Convert a BST into a DLL and DLL to BST in place.

889


How can we make a class virtual?

851


What is a java list?

831


What is java virtual machine? Explain

789


What are different types of inner classes ?

786


Difference between linkedlist and arraylist.

823


How to perform bubble sort in java?

798