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SetOperations
SetOperations.java
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
/**
* A class that lets people play with set operations among various sets
*
* @author Cory Lueninghoener <cluening@cse.unl.edu>
*/
public class SetOperations extends JApplet {
String universeNumbers = "1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16";
String[] aBoxNumbers = {"1, 2, 3", "2, 4, 6, 8", "10, 12, 14, 16"};
String[] bBoxNumbers = {"1, 2, 3, 5, 8, 13", "1, 2, 4, 8, 16", "1, 3, 5, 7, 9"};
String universeAlphabet = "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";
String[] aBoxAlphabet = {"A, B, C, D", "A, E, I, O, U", "E, L, N, R, S, T"};
String[] bBoxAlphabet = {"Z, Y, L", "C, S, E", "B, C, D, F, G, H"};
String universeAnimals = "Cow, Pig, Horse, Dog, Cat, Fish, Chicken";
String[] aBoxAnimals = {"Cow, Pig, Horse, Chicken", "Dog, Cat, Fish"};
String[] bBoxAnimals = {"Fish, Chicken", "Horse, Cow", "Cow, Pig, Horse, Dog, Cat"};
boolean isStandalone = false;
JPanel jPanel1 = new JPanel();
JLabel universeLabel = new JLabel();
JComboBox aBox = new JComboBox();
JLabel aLabel = new JLabel();
JComboBox universeBox = new JComboBox();
JLabel bLabel = new JLabel();
JComboBox bBox = new JComboBox();
JLabel guessLabel = new JLabel();
JTextField guessBox = new JTextField();
JLabel answerLabel = new JLabel();
JTextField answerBox = new JTextField();
JLabel operationLabel = new JLabel();
JPanel operationPanel = new JPanel();
JComboBox operationBox = new JComboBox();
JButton checkButton = new JButton();
JButton showButton = new JButton();
GridBagLayout gridBagLayout1 = new GridBagLayout();
JTextField statusBar = new JTextField();
/**Get a parameter value*/
public String getParameter(String key, String def) {
return isStandalone ? System.getProperty(key, def) :
(getParameter(key) != null ? getParameter(key) : def);
}
/**Construct the applet*/
public SetOperations() {
}
/**Initialize the applet*/
public void init() {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
//setUIFont(new javax.swing.plaf.FontUIResource("Lucida Sans", Font.BOLD, 12));
FontFixer.setUIFont("Lucida Sans");
SwingUtilities.updateComponentTreeUI(jPanel1);
}
//public static void setUIFont(javax.swing.plaf.FontUIResource f){
public static void setUIFont(String name){
javax.swing.plaf.FontUIResource f;
System.out.println("Fixing fonts");
java.util.Enumeration keys = UIManager.getDefaults().keys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
Object value = UIManager.get (key);
if (value instanceof javax.swing.plaf.FontUIResource){
//f = new javax.swing.plaf.FontUIResource(name, ((Font)value).getStyle(), ((Font)value).getSize());
f = new javax.swing.plaf.FontUIResource(name, Font.PLAIN, ((Font)value).getSize());
System.out.println(f);
UIManager.put (key, f);
}
}
}
/**Component initialization*/
private void jbInit() throws Exception {
this.setSize(new Dimension(400,300));
jPanel1.setLayout(gridBagLayout1);
universeLabel.setText("Universe:");
universeBox.addItem("");
universeBox.addItem(universeNumbers);
universeBox.addItem(universeAlphabet);
universeBox.addItem(universeAnimals);
aLabel.setText("Set A:");
universeBox.setEditable(true);
universeBox.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
universeBox_actionPerformed(e);
}
});
aBox.setEditable(true);
bLabel.setText("Set B:");
guessLabel.setText("Guess:");
answerLabel.setText("Answer:");
answerBox.setEditable(false);
operationLabel.setText("Operation:");
//operationBox.setFont(new java.awt.Font("Arial Unicode MS", Font.PLAIN, 12));
operationBox.addItem("A\u2229B");
operationBox.addItem("A\u222aB");
operationBox.addItem("A-B");
operationBox.addItem("A\u0305\u222a\u0305B\u0305");
operationBox.addItem("A\u0305\u2229\u0305B\u0305");
operationBox.addItem("A\u0305-\u0305B\u0305");
bBox.setEditable(true);
checkButton.setText("Check Answer");
checkButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
checkButton_actionPerformed(e);
}
});
showButton.setText("Show Answer");
showButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
showButton_actionPerformed(e);
}
});
operationBox.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
operationBox_actionPerformed(e);
}
});
statusBar.setEditable(false);
statusBar.setText("Type your answer into the \"Guess\" field");
this.getContentPane().add(jPanel1, BorderLayout.CENTER);
jPanel1.add(universeLabel,
new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
2, 2));
jPanel1.add(universeBox,
new GridBagConstraints(1, 0, 2, 1, 1.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(aLabel,
new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(aBox,
new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(bLabel,
new GridBagConstraints(0, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(bBox,
new GridBagConstraints(1, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(operationLabel,
new GridBagConstraints(0, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(operationPanel,
new GridBagConstraints(1, 3, 1, 1, 1.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
operationPanel.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
operationPanel.add(operationBox);
jPanel1.add(guessLabel,
new GridBagConstraints(0, 4, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(guessBox,
new GridBagConstraints(1, 4, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(answerLabel,
new GridBagConstraints(0, 5, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(answerBox,
new GridBagConstraints(1, 5, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(checkButton,
new GridBagConstraints(2, 4, 1, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(showButton,
new GridBagConstraints(2, 5, 1, 1, 0.0, 0.0,
GridBagConstraints.EAST,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
jPanel1.add(statusBar,
new GridBagConstraints(0, 6, 3, 1, 0.0, 0.0,
GridBagConstraints.CENTER,
GridBagConstraints.BOTH,
new Insets(2, 2, 2, 2),
0, 0));
}
/**Get Applet information*/
public String getAppletInfo() {
return "Applet Information";
}
/**Get parameter info*/
public String[][] getParameterInfo() {
return null;
}
//static initializer for setting look & feel
static {
try {
//UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
//UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
}
catch(Exception e) {
}
}
TreeSet createSet(String setString){
TreeSet set = new TreeSet();
String token1, token2;
StringTokenizer st1 = new StringTokenizer(setString, ", ");
while (st1.hasMoreTokens()) {
token1 = st1.nextToken();
StringTokenizer st2 = new StringTokenizer(token1, ",");
while(st2.hasMoreTokens()){
token2 = st2.nextToken();
set.add(token2);
}
}
return set;
}
private String doOperationString(TreeSet dest, TreeSet source, int num){
if(num <= 5){
TreeSet newSet = doOperation(dest, source, num);
return newSet.toString();
}
else if(num == 6){
return ""+dest.size();
}
else if(num == 7){
return ""+source.size();
}
return "Error";
}
/**
* Performs a specified operation on a specified set
* @param dest The recieving end of the operation ("A" in "A-B")
* @param source The other end of the operation ("B" in "A-B")
* @return The set resulting from performing the operation
*/
private TreeSet doOperation(TreeSet dest, TreeSet source, int num){
TreeSet newSet = (TreeSet)dest.clone();
TreeSet universeSet = createSet((String)universeBox.getSelectedItem());
if(num == 0){
newSet.retainAll(source);
}
else if(num == 1){
newSet.addAll(source);
}
else if(num == 2){
newSet.removeAll(source);
}
else if(num == 3){
newSet.retainAll(source);
universeSet.removeAll(newSet);
newSet = universeSet;
}
else if(num == 4){
newSet.addAll(source);
universeSet.removeAll(newSet);
newSet = universeSet;
}
else if(num == 5){
newSet.removeAll(source);
universeSet.removeAll(newSet);
newSet = universeSet;
}
return newSet;
}
private void operationBox_actionPerformed(ActionEvent e){
//System.out.println("Here goes...");
statusBar.setBackground(new Color(207, 207, 207));
statusBar.setText("Type your answer into the \"Guess\" field");
}
private void showButton_actionPerformed(ActionEvent e) {
String aString = (String)aBox.getSelectedItem();
String bString = (String)bBox.getSelectedItem();
TreeSet setA = new TreeSet();
TreeSet setB = new TreeSet();
//System.out.println(aString);
//System.out.println(bString);
setA = createSet(aString);
setB = createSet(bString);
//setA = doOperation(setA, setB, operationBox.getSelectedIndex());
//aString = (setA.toString());
aString = doOperationString(setA, setB, operationBox.getSelectedIndex());
aString = aString.replace('[', ' ');
aString = aString.replace(']', ' ');
//System.out.println(aString);
if(aString.equals(" "))
answerBox.setText("<Empty Set>");
else
answerBox.setText(aString);
}
private void checkButton_actionPerformed(ActionEvent e) {
TreeSet setA = createSet((String)aBox.getSelectedItem());
TreeSet setB = createSet((String)bBox.getSelectedItem());
TreeSet setAnswer;
TreeSet setGuess = createSet(guessBox.getText());
String[] stringA = (String[])setA.toArray(new String[0]);
String[] stringB = (String[])setB.toArray(new String[0]);
String[] stringGuess = (String[])setGuess.toArray(new String[0]);
String[] stringAnswer;
setAnswer = doOperation(setA, setB, operationBox.getSelectedIndex());
stringAnswer = (String[])setAnswer.toArray(new String[0]);
if(stringAnswer.length != stringGuess.length){
//System.out.println("Different Lengths\n");
statusBar.setBackground(Color.red);
statusBar.setText("Incorrect, please try again");
return;
}
setAnswer.removeAll(setGuess);
if(((String[])setAnswer.toArray(new String[0])).length == 0){
//System.out.println("Same\n");
statusBar.setBackground(Color.green);
statusBar.setText("Correct!");
return;
}
//System.out.println("Nothing caught me - must be wrong\n");
statusBar.setBackground(Color.red);
statusBar.setText("Incorrect, please try again");
}
private void guessBox_mouseClicked(MouseEvent e) {
statusBar.setBackground(new Color(207, 207, 207));
statusBar.setText("Type your answer into the \"Guess\" field");
}
private void universeBox_actionPerformed(ActionEvent e) {
//System.out.println("Here goes...");
aBox.removeAllItems();
bBox.removeAllItems();
switch (universeBox.getSelectedIndex()){
case 1:
for(int i=0;i<aBoxNumbers.length;i++){
aBox.addItem(aBoxNumbers[i]);
}
for(int i=0;i<bBoxNumbers.length;i++){
bBox.addItem(bBoxNumbers[i]);
}
break;
case 2:
for(int i=0;i<aBoxAlphabet.length;i++){
aBox.addItem(aBoxAlphabet[i]);
}
for(int i=0;i<bBoxAlphabet.length;i++){
bBox.addItem(bBoxAlphabet[i]);
}
break;
case 3:
for(int i=0;i<aBoxAnimals.length;i++){
aBox.addItem(aBoxAnimals[i]);
}
for(int i=0;i<bBoxAnimals.length;i++){
bBox.addItem(bBoxAnimals[i]);
}
break;
}
}
}
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