Untitled

import java.lang.reflect.Array;
import java.util.*;

class Obj {
	int time;
	int index;

	Obj(int t, int i) {
		time = t;
		index = i;
	}
}

class Scheduling implements Runnable {

	int[] tasks;

	Scheduling(int processes[]) {
		tasks = processes;
		run();
	}

	void FCFS() throws InterruptedException {
		for (int i = 0; i < tasks.length; i++) {
			try {
				System.out.println("Process-" + (i + 1) + " executing");
				Thread.sleep(tasks[i]);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	void SJF() {
		Obj[] temp= new Obj[tasks.length];
		for (int i = 0; i < tasks.length; i++) {
			int x= tasks[i];
			temp[i]= new Obj(tasks[i],i);
		}
		for (int i = 0; i < tasks.length; i++) {
			System.out.println(temp[i].index + " :" + temp[i].time);
		}
//		Arrays.sort();
		for (int i = 0; i < tasks.length; i++) {
			try {
				System.out.println("Process-" + (i + 1) + " executing");
				Thread.sleep(tasks[i]);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}

	@Override
	public void run() {
		Scanner sc = new Scanner(System.in);
		int ch = 0;
		while (ch != -1) {
			System.out.println("\n1.FCFS\n2.SJF\n3.Priorioty\n4.Round Robin\nENTER: ");
			ch = sc.nextInt();
			if (ch == -1)
				continue;
			try {

				switch (ch) {
				case 1: {
					FCFS();
					break;
				}
				case 2: {
					SJF();
					break;
				}
				case 3: {
					priority();
					break;
				}
				case 4: {
					roundRobin();
					break;
				}
				default:
					throw new IllegalArgumentException("Unexpected value: " + ch);
				}
			} catch (Exception e) {
				// TODO: handle exception
			}
		}
		sc.close();
	}

	private void roundRobin() {
		// TODO Auto-generated method stub

	}

	private void priority() {
		// TODO Auto-generated method stub

	}
}

public class main {
	public static void main(String[] args) {
		int processes[] = { 300, 125, 400, 150, 100 };
		Scheduling obj = new Scheduling(processes);
	}
}