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JAVA Midterm Review Spring 2015
Daniel Estrada-001040277
1. Create a Java program that uses an inputbox to ask
user to enter his/her name, the program displays his/her
name on a message box.
import javax.swing.JOptionPane;
public class MidTermProgram1 {
public static void main(String[] args) {
String full_name;
full_name =
JOptionPane.showInputDialog("What is your name?"
,"full_name");
JOptionPane.showMessageDialog(null,
full_name);
}
}
2. Create a Java program that can draw an Olympic ring ,
your name in red with font size 18.
a. Olympic ring
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JTextArea;
public class Number2olympicringsandname extends
JComponent{
public void paint(Graphics g)
{
//draw name
g.setFont(new Font("TimesRoman", Font.PLAIN,
16));
g.setColor(Color.BLACK);
g.drawString("Daniel Estrada", 30, 90);
Graphics2D g2 = (Graphics2D) g;
g.drawOval (1,0,40,40);
g.setColor(Color.YELLOW);
g.drawOval (21,20,40,40);
g.setColor(Color.BLACK);
g.drawOval (41,0,40,40);
g.setColor(Color.GREEN);
g.drawOval (61,20,40,40);
g.setColor(Color.RED);
g.drawOval (81,0,40,40);
g.setColor(Color.BLUE);
}
}
b. view file (main file)
import javax.swing.JFrame;
public class Number2viewer {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(300, 300);
frame.setTitle("Daniel Estrada");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLO
SE);
Number2olympicringsandname ft = new
Number2olympicringsandname();
frame.add(ft);
frame.setVisible(true);
}
}
3. Create a Java program that can draw 4 cars in any
arrangement.
a. Car.java
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
/**
A car shape that can be positioned anywhere on the
screen.
*/
public class Cars
{
private int xLeft;
private int yTop;
/**
Constructs a car with a given top left corner.
@param x the x-coordinate of the top-left corner
@param y the y-coordinate of the top-left corner
*/
public Cars(int x, int y)
{
xLeft = x;
yTop = y;
}
/**
Draws the car.
@param g2 the graphics context
*/
public void draw(Graphics2D g2)
{
Rectangle body = new Rectangle(xLeft, yTop + 10,
60, 10);
Ellipse2D.Double frontTire
= new Ellipse2D.Double(xLeft + 10, yTop + 20, 10,
10);
Ellipse2D.Double rearTire
= new Ellipse2D.Double(xLeft + 40, yTop + 20, 10,
10);
// The bottom of the front windshield
Point2D.Double r1 = new Point2D.Double(xLeft +
10, yTop + 10);
// The front of the roof
Point2D.Double r2 = new Point2D.Double(xLeft +
20, yTop);
// The rear of the roof
Point2D.Double r3 = new Point2D.Double(xLeft +
40, yTop);
// The bottom of the rear windshield
Point2D.Double r4 = new Point2D.Double(xLeft +
50, yTop + 10);
Line2D.Double frontWindshield = new
Line2D.Double(r1, r2);
Line2D.Double roofTop = new Line2D.Double(r2,
r3);
Line2D.Double rearWindshield = new
Line2D.Double(r3, r4);
g2.draw(body);
g2.draw(frontTire);
g2.draw(rearTire);
g2.draw(frontWindshield);
g2.draw(roofTop);
g2.draw(rearWindshield);
}
}
b. CarComponent.java
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JComponent;
/**
This component draws two car shapes.
*/
public class CarComponent extends JComponent
{
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
Cars car1 = new Cars (0, 0);
int x = getWidth() - 60;
int y = getHeight() - 30;
Cars car2 = new Cars (x, y);
int a = getWidth() - 100;
int b = getHeight() - 100;
Cars car3 = new Cars (a,b);
int q = getWidth() - 70;
int z = getHeight() - 70;
Cars car4 = new Cars (q,z);
car1.draw(g2);
car2.draw(g2);
car3.draw(g2);
car4.draw(g2);
}
}
c. CarView.java
import javax.swing.JComponent;
import javax.swing.JFrame;
public class Cars_4_Viewer extends JComponent
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
frame.setSize(300, 400);
frame.setTitle("Four cars");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CL
OSE);
CarComponent r = new CarComponent();
frame.add(r);
frame.setVisible(true);
}
}
4. Create a Java program that can draw an Alien face. (
must be different from the textbook version)
a. FaceComponent
//Daniel Estrada
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Ellipse2D.Double;
import javax.swing.JComponent;
public class FaceComponent
extends JComponent
{
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D)g;
Ellipse2D.Double head = new
Ellipse2D.Double(5.0D, 10.0D, 100.0D, 200.0D);
g2.setColor(Color.GREEN);
g2.fill(head);
g2.setColor(Color.BLACK);
g2.draw(head);
Ellipse2D.Double rightEye = new
Ellipse2D.Double(75.0D, 70.0D, 15.0D, 30.0D);
g2.setColor(Color.RED);
g2.fill(rightEye);
g2.setColor(Color.BLACK);
g2.draw(rightEye);
Ellipse2D.Double leftEye = new
Ellipse2D.Double(25.0D, 70.0D, 15.0D, 30.0D);
g2.setColor(Color.RED);
g2.fill(leftEye);
g2.setColor(Color.BLACK);
g2.draw(leftEye);
Ellipse2D.Double mouth = new
Ellipse2D.Double(44.0D, 120.0D, 40.0D, 22.0D);
g2.setColor(Color.RED);
g2.fill(mouth);
g2.setColor(Color.BLACK);
g2.draw(mouth);
g2.setColor(Color.BLACK);
Ellipse2D.Double rightnose = new
Ellipse2D.Double(76.0D, 83.0D, 10.0D, 10.0D);
g2.fill(rightnose);
g2.setColor(Color.BLACK);
Ellipse2D.Double leftnose = new
Ellipse2D.Double(27.0D, 83.0D, 10.0D, 10.0D);
g2.fill(leftnose);
}
}
b. FaceViewer
import javax.swing.JFrame;
public class AlienFaceViewer
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
frame.setSize(400, 500);
frame.setTitle("Alien Face!");
frame.setDefaultCloseOperation(3);
FaceComponent component = new FaceComponent();
frame.add(component);
frame.setVisible(true);
}
}
5. Create a Java program that prompts the user to enter 2
numbers, the program calculate and print
 The sum
 The different
 The average
package midterm_review;
import java.util.Scanner;
public class MidtermReview_5 {
public static void main(String[] args) {
double num1, num2;
Scanner input = new Scanner(System.in);
System.out.println("Please select your first
number\n");
num1 = input.nextDouble();
System.out.println("Please select your second
number\n");
num2 = input.nextDouble();
//Sum of two numbers
System.out.println("The sum of two numbers is
" + (num1 + num2));
//Difference of two numbers
System.out.println("The difference of two
numbers is " + (num1 - num2));
//Average of two numbers
System.out.println("The average of two
numbers is " + (num1 + num2)/2);
}
}
6. Create a Java program that prompts the user for a
lengths and width of a rectangle
The area and the perimeter of the rectangle
The length of the diagonal ( use Pythagorean theorem)
package defaultpackage;
import java.util.Scanner;
public class midterm_6 {
public static void main(String[] args) {
double length, width = 0;
Scanner in = new Scanner(System.in);
System.out.println("Please enter the rectangle length");
length = in.nextDouble();
System.out.println("please enter the rectangle width");
width = in.nextDouble();
double perimeter = (length + width) * 2;
double rectPythag = Math.pow(width, 2) + Math.pow(length, 2);
double rectangleDiagonal = Math.sqrt(rectPythag);
System.out.println("Rectangle perimeter is "+perimeter);
System.out.println("Rectangle diagonal is " + rectangleDiagonal);
}
}
7. Create an Android Application that write your name and
post your photo.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${packageName}.${activityClass}" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="32dp"
android:text="Group Number 7"
android:textSize="35dp" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/picture" />
8. Create an Android application that includes 3
pages. The first pages includes 2 buttons , The first
button display "My favorite Movie", which links to
another page, displays a picture of your movie. The
second button displays "My favorite book", which links
to another page, displays a picture of your favorite
book.
a. Main.java
package com.example.favorite;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Main extends Activity {
@Override
protected void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button b = (Button)
findViewById(R.id.bookbutton);
Button b2 = (Button)
findViewById(R.id.moviebutton);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(Main.this,
Book.class));
}
});
b2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
startActivity(new Intent(Main.this,
Movie.class));
}
});
}
}
b. Book.java
package com.example.favorite;
import android.app.Activity;
import android.os.Bundle;
public class Book extends Activity {
@Override
protected void onCreate(Bundle
savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.book);
}
}
c. Movie.java
package com.example.favorite;
import android.app.Activity;
import android.os.Bundle;
public class Movie extends Activity {
@Override
protected void onCreate(Bundle
savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.movie);
}
}