arraylist of object in java code example

Example 1: Write a java program to create a arraylist of students perform sorting based on roll no and name

package beginnersbook.com;
import java.util.*;
public class Details  {

	public static void main(String args[]){
	   ArrayList<Student> arraylist = new ArrayList<Student>();
	   arraylist.add(new Student(101, "Zues", 26));
	   arraylist.add(new Student(505, "Abey", 24));
	   arraylist.add(new Student(809, "Vignesh", 32));

	   /*Sorting based on Student Name*/
	   System.out.println("Student Name Sorting:");
	   Collections.sort(arraylist, Student.StuNameComparator);

	   for(Student str: arraylist){
			System.out.println(str);
	   }

	   /* Sorting on Rollno property*/
	   System.out.println("RollNum Sorting:");
	   Collections.sort(arraylist, Student.StuRollno);
	   for(Student str: arraylist){
			System.out.println(str);
	   }
	}
}

Example 2: Write a java program to create a arraylist of students perform sorting based on roll no and name

Student Name Sorting:
[ rollno=505, name=Abey, age=24]
[ rollno=809, name=Vignesh, age=32]
[ rollno=101, name=Zues, age=26]
RollNum Sorting:
[ rollno=101, name=Zues, age=26]
[ rollno=505, name=Abey, age=24]
[ rollno=809, name=Vignesh, age=32]