Java

import java.util.*;
import java.util.Scanner;

public class firstFit
{
    public static void main(String[] args) {
        
          Scanner keyboard = new Scanner(System.in);
          int[] blocks;             
          blocks = new int[3];      
          blocks[0] = 700; 
          blocks[1] = 850; 
          blocks[2] = 610; 
          //blocks[3] = 300;
          //Arrays.sort(blocks);
         
                       
          int[] jobs = new int[3];      
          
          //int index;
          
          System.out.println("Enter 3 jobs:");
          for(int index = 0; index < 3; index++){
              if(keyboard.hasNextInt()) jobs[index] = keyboard.nextInt();
            }
          
          for(int j=0; j<3;j++){
              for(int i=0; i<3; i++){
                  if(jobs[j] <= blocks[i]){
                      blocks[i]=j;
                      boolean wasAssigned[] = new boolean[blocks[i]=j];
                      System.out.println("Job" + jobs[j] + " in memory" + blocks[i]);
                      break;
                      }
                       else if(jobs[j] > blocks[i]){
                      System.out.println("Jobs in waiting queue " + jobs[j]);
                                            
                    }
                    
                }
            }       
          
        }    
}

package swing1;

/**
 *
 * @author James
 */
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import java.io.*;


public class swing {

    public static void main (String[] args) {

        JFrame frame = new JFrame("Computer Architecture Conversions");
        frame.setVisible(true);
        frame.setSize(500,500);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JPanel panel = new JPanel ();
        frame.add(panel);

        JButton button = new JButton ("Binary to Decimal") ;
        JButton button2 = new JButton ("Decimal to Binary");
        JButton button3 = new JButton ("Decimal to Hexadecimal");
        JButton button4 = new JButton ("Hexadecimal to Decimal");
        JButton button5 = new JButton ("Library of Boolean Algebra Rules");
        JButton button6 = new JButton ("1's Complement");
        JButton button7 = new JButton ("2's Complement");
        panel.add(button);
        panel.add(button2);
        panel.add(button3);
        panel.add(button4);
        panel.add(button5);
        panel.add(button6);
        panel.add(button7);
        button.addActionListener(new Action());
        button2.addActionListener(new Action2());
        button3.addActionListener(new Action3());
        button4.addActionListener(new Action4());
        button5.addActionListener(new Action5());
        button6.addActionListener(new Action6());
        button7.addActionListener(new Action7());
    }
        static class Action implements ActionListener{

            public void actionPerformed (ActionEvent e){
            JFrame frame2 = new JFrame ("Binary to Decimal Conversion");
            frame2.setVisible(true);
            frame2.setSize(500,300);
            JLabel label = new JLabel ("Binary");
            JPanel panel = new JPanel();
            JButton b2d = new JButton("Convert to Decimal Now!");
            JTextField text = new JTextField(25);
            frame2.add(panel);
            panel.add(text);
            panel.add(label);
            panel.add(b2d);
            }
        }

        static class Action2 implements ActionListener{
            
            public void actionPerformed (ActionEvent e){
            JFrame frame3 = new JFrame ("Decimal to Binary Conversion");
            frame3.setVisible(true);
            frame3.setSize(500,300);
            JLabel label = new JLabel ("Decimal");
            JPanel panel = new JPanel();
            JButton d2b = new JButton("Convert to Binary Now!");
            JTextField text = new JTextField(25);
            frame3.add(panel);
            panel.add(text);
            panel.add(label);
            panel.add(d2b);
                
            }
        }

         static class Action3 implements ActionListener{

            public void actionPerformed (ActionEvent e){
            JFrame frame4 = new JFrame ("Decimal to Hexadecimal Conversion");
            frame4.setVisible(true);
            frame4.setSize(500,300);
            JLabel label = new JLabel ("Decimal");
            JPanel panel = new JPanel();
            JButton d2h = new JButton("Convert to Hexadecimal Now!");
            JTextField text = new JTextField(25);
            frame4.add(panel);
            panel.add(text);
            panel.add(label);
            panel.add(d2h);
            }
        }
     static class Action4 implements ActionListener{

            public void actionPerformed (ActionEvent e){
            JFrame frame5 = new JFrame ("Hexadecimal to Decimal Conversion");
            frame5.setVisible(true);
            frame5.setSize(500,300);
            JLabel label = new JLabel ("Hexadecimal");
            JPanel panel = new JPanel();
            JButton h2d = new JButton("Convert to Decimal Now!");
            JTextField text = new JTextField(25);
            frame5.add(panel);
            panel.add(text);
            panel.add(label);
            panel.add(h2d);
            }
        }

    static class Action5 implements ActionListener{

            public void actionPerformed (ActionEvent e){
            JFrame frame6 = new JFrame ("Library of Boolean Algebra Rules");
            frame6.setVisible(true);
            frame6.setSize(500,300);
            JLabel label = new JLabel ("You clicked me!");
            JPanel panel = new JPanel();
            frame6.add(panel);
            panel.add(label);
            }
        }

     static class Action6 implements ActionListener{

            public void actionPerformed (ActionEvent e){
            JFrame frame7 = new JFrame ("1's Complement Conversion");
            frame7.setVisible(true);
            frame7.setSize(500,300);
            JLabel label = new JLabel ("You clicked me!");
            JPanel panel = new JPanel();
            frame7.add(panel);
            panel.add(label);
            }
        }

     static class Action7 implements ActionListener{

            public void actionPerformed (ActionEvent e){
            JFrame frame8 = new JFrame ("2's Complement Conversion");
            frame8.setVisible(true);
            frame8.setSize(500,300);
            JLabel label = new JLabel ("You clicked me!");
            JPanel panel = new JPanel();
            frame8.add(panel);
            panel.add(label);
            }
        }
    }

import java.text.*;
import java.util.*;

class Date {
	public static void main(String [] args) {
		Date date = new Date();
		SimpleDateFormat sdf;
		
		
		//will show time
		sdf = new SimpleDateFormat("hh:mm:ss");
		//System.out.println(sdf.format(date));

		//will show day + date + time
		sdf = new SimpleDateFormat("dd MMM yyyy hh:mm:ss");
		System.out.println(sdf.format(date));
		
		//will show day + date
		sdf = new SimpleDateFormat("E MMM dd yyyy");
		System.out.println(sdf.format(date));
	}
}