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Java after Part 1A and 9/10 chapters of Deitel
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‎.gitignore‎

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# Thank you GitHub
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*.class
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files
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*.jar
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*.war
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*.ear
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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# java1A
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java1A/.metadata/**
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# Deitel and Deitel 10th
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deitel-10th/examples/**

‎deitel-10th/DrawPanel.java‎

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// GUI Exercise for Chapter 10 using inheritance.
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import java.awt.Color;
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import java.awt.Graphics;
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import java.util.Arrays;
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import java.util.Random;
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import javax.swing.JPanel;
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public class DrawPanel extends JPanel {
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private final MyShape[] shapes;
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private final int[] total_shapes = new int[3];
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public int getLinesNum() { return total_shapes[0]; }
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public int getRectsNum() { return total_shapes[1]; }
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public int getOvalsNum() { return total_shapes[2]; }
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public DrawPanel(int shapes_num) {
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Random rand = new Random();
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setBackground(Color.WHITE);
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shapes = new MyShape[shapes_num];
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Arrays.fill(total_shapes, 0);
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for (int count = 0; count < shapes.length; count++) {
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int x1 = rand.nextInt(300);
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int y1 = rand.nextInt(300);
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int x2 = rand.nextInt(300);
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int y2 = rand.nextInt(300);
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Color color = new Color(rand.nextInt(256),
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rand.nextInt(256), rand.nextInt(256));
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total_shapes[x1 % 3]++;
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if (x1 % 3 == 0)
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shapes[count] = new MyLine(x1, y1, x2, y2, color);
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else if (x1 % 3 == 1)
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shapes[count] = new MyRectangle(x1,y1,x2,y2,color, x2 % 2 == 0);
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else
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shapes[count] = new MyOval(x1,y1,x2,y2,color, x2 % 2 == 0);
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}
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}
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public void paintComponent(Graphics g) {
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super.paintComponent(g);
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for (MyShape shape : shapes)
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shape.draw(g);
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}
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}

‎deitel-10th/MyBoundedShape.java‎

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// GUI Exercise for Chapter 10 using inheritance.
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import java.awt.Color;
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public abstract class MyBoundedShape extends MyShape {
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private boolean filled;
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public boolean getFilled() { return filled; }
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public void setFilled(boolean f) { filled = f; }
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// implicit call to super();
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public MyBoundedShape() { this.filled = false; }
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public MyBoundedShape(int x1, int y1, int x2, int y2,
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Color color, boolean filled) {
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super(x1, y1, x2, y2, color);
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this.filled = filled;
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}
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public int getUpperLeftX() {
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return Math.min(getX1(),getX2());
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}
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public int getUpperLeftY() {
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return Math.min(getY1(),getY2());
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}
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public int getWidth() {
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return Math.abs(getX2()-getX1()); }
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public int getHeight() {
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return Math.abs(getY2()-getY1());
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}
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}

‎deitel-10th/MyLine.java‎

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// GUI Exercise for Chapter 8.
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import java.awt.Color;
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import java.awt.Graphics;
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public class MyLine extends MyShape {
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public MyLine() { /* implicit call to super(); */ }
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public MyLine(int x1, int y1, int x2, int y2, Color color) {
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super(x1,y1,x2,y2,color);
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}
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public void draw(Graphics g) {
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g.setColor(getColor());
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g.drawLine(getX1(), getY1(), getX2(), getY2());
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}
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}

‎deitel-10th/MyOval.java‎

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// GUI Exercise for Chapter 10 using inheritance.
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import java.awt.Color;
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import java.awt.Graphics;
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public class MyOval extends MyBoundedShape {
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public MyOval() { /* implicit super(); */ }
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public MyOval(int x1, int y1, int x2, int y2,
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Color color, boolean filled) {
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super(x1, y1, x2, y2, color, filled);
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}
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public void draw(Graphics g) {
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g.setColor(getColor());
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if (getFilled())
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g.fillOval(getUpperLeftX(), getUpperLeftY(),
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getWidth(), getHeight());
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else
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g.drawOval(getUpperLeftX(), getUpperLeftY(),
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getWidth(), getHeight());
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}
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}

‎deitel-10th/MyRectangle.java‎

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// GUI Exercise for Chapter 8.
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import java.awt.Color;
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import java.awt.Graphics;
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public class MyRectangle extends MyBoundedShape {
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public MyRectangle() { /* implicit super(); */ }
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public MyRectangle(int x1, int y1, int x2, int y2,
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Color color, boolean filled) {
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super(x1, y1, x2, y2, color, filled);
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}
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public void draw(Graphics g) {
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g.setColor(getColor());
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if (getFilled())
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g.fillRect(getUpperLeftX(), getUpperLeftY(),
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getWidth(), getHeight());
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else
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g.drawRect(getUpperLeftX(), getUpperLeftY(),
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getWidth(), getHeight());
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}
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}

‎deitel-10th/MyShape.java‎

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// GUI Ex 10.1: Introducing inheritance.
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import java.awt.Color;
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import java.awt.Graphics;
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public abstract class MyShape {
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private int x1;
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private int y1;
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private int x2;
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private int y2;
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private Color color;
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public int getX1() { return x1; }
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public int getX2() { return x2; }
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public int getY1() { return y1; }
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public int getY2() { return y2; }
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public Color getColor() { return color; }
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private static int check(int a) { return a > 0 ? a : 0; }
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public void setX1 (int x) { x1 = check(x); }
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public void setY1 (int y) { y1 = check(y); }
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public void setX2 (int x) { x2 = check(x); }
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public void setY2 (int y) { y2 = check(y); }
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public void setColor(Color c) { color = c; }
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public MyShape() { this(0,0,0,0,Color.BLACK); }
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public MyShape(int x1, int y1, int x2, int y2, Color color) {
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this.x1 = check(x1);
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this.y1 = check(y1);
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this.x2 = check(x2);
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this.y2 = check(y2);
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this.color = color;
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}
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public abstract void draw(Graphics g);
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}

‎deitel-10th/Test.java‎

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// Ex 8.??: TODO
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import java.util.Scanner;
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public class Test {
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private static final Scanner input = new Scanner(System.in);
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public static void main(String[] args) {
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}
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private static int getPosInt(int lower, int upper, String msg) {
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int x = input.nextInt();
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while (x < lower || upper < x) {
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System.out.println(msg);
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x = input.nextInt();
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}
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return x;
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}
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}

‎deitel-10th/TestDraw.java‎

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// GUI Ex 10: TestDraw.java for inherited classes.
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import java.awt.BorderLayout;
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import javax.swing.JFrame;
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import javax.swing.JLabel;
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import javax.swing.JOptionPane;
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public class TestDraw
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{
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public static void main(String[] args)
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{
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int i = Integer.parseInt(
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JOptionPane.showInputDialog(
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"How many shapes do you want?"));
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while (i < 1) {
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i = Integer.parseInt(
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JOptionPane.showInputDialog(
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"Number must be 1 or greater."));
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}
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DrawPanel panel = new DrawPanel(i);
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JFrame app = new JFrame();
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JLabel count = new JLabel(
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String.format("Lines: %d, Rectangles: %d, Ovals: %d",
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panel.getLinesNum(), panel.getRectsNum(), panel.getOvalsNum()));
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app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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app.add(panel);
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app.add(count, BorderLayout.SOUTH);
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app.setSize(300, 300);
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app.setVisible(true);
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}
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} // end class TestDraw
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/**************************************************************************
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* (C) Copyright 1992-2014 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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*************************************************************************/

‎deitel-10th/ch01-02/Arith.java‎

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// Ex 2.15: Enter two integers and return sum, difference, product and quotient.
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import java.util.Scanner;
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public class Arith {
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public static void main(String[] args) {
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Scanner input = new Scanner(System.in);
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System.out.print("Enter first integer: ");
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int a = input.nextInt();
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System.out.print("Enter second integer: ");
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int b = input.nextInt();
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System.out.printf("Sum: %d%nDifference: %d%nProduct: %d%nQuotient: %d%n", a+b, a-b, a*b, a/b);
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}
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}

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