gistfile1.txt

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

public class Student {

	private String name;
	private String major;
	private int number;

	public Student(String name, String major, int number) {
		super();
		this.name = name;
		this.major = major;
		this.number = number;
	}
	
	public static void main(String[] args) {
		List<String> names = Arrays.asList("Joe", "Jack", "John","James");
		List<String> majors = Arrays.asList("English","Math","Geography");
		Map<String,Student> students = new HashMap<String,Student>();
		
		for(int i = 0; i < 100; i++){
			Collections.shuffle(names);
			Collections.shuffle(majors);
			students.put(names.get(0) + String.valueOf(i), new Student(names.get(0), majors.get(0), i));
		}

		List<Student> mathMajors = getStudents(students, "Math");
		
		for(Student student:mathMajors){
			System.out.println(student.name);
			System.out.println(student.major);
		}
	}
	
	public static List<Student> getStudents(Map<String,Student> students, String searchToken){
		List<Student> results = new ArrayList<Student>();
		for(Entry<String,Student> entry:students.entrySet()){
			if(entry.getValue().getMajor().equalsIgnoreCase(searchToken)){
				results.add(entry.getValue());
			}
		}
		return results;
	}

	
	public String getName() {
		return this.name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getMajor() {
		return this.major;
	}

	public void setMajor(String major) {
		this.major = major;
	}

	public int getNumber() {
		return this.number;
	}

	public void setNumber(int number) {
		this.number = number;
	}

}