public class CalcLauncher
99 | extends java.lang.Object
100 | Calculator object.Calculator| Constructor and Description | 122 |
|---|
CalcLauncher() |
125 |
| Modifier and Type | 139 |Method and Description | 140 |
|---|---|
static void |
143 | main(java.lang.String[] args) |
144 |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitpublic CalcLauncher()174 |
public static void main(java.lang.String[] args)191 |
args - Currently no arguments required to be passed to this program.private class Calculator.OperatorAction
107 | extends java.lang.Object
108 | implements java.awt.event.ActionListener
109 | | Modifier and Type | 127 |Field and Description | 128 |
|---|---|
private int |
131 | operator |
132 |
| Constructor and Description | 146 |
|---|
Calculator.OperatorAction(int operation) |
149 |
| Modifier and Type | 163 |Method and Description | 164 |
|---|---|
void |
167 | actionPerformed(java.awt.event.ActionEvent event) |
168 |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitprivate int operator198 |
public Calculator.OperatorAction(int operation)215 |
operation - public void actionPerformed(java.awt.event.ActionEvent event)233 |
actionPerformed in interface java.awt.event.ActionListenerpublic class Calculator
103 | extends java.lang.Object
104 | implements java.awt.event.ActionListener
105 | | Modifier and Type | 125 |Class and Description | 126 |
|---|---|
private class |
129 | Calculator.OperatorAction |
130 |
| Modifier and Type | 144 |Field and Description | 145 |
|---|---|
(package private) javax.swing.JPanel |
148 | buttonPanel |
149 |
(package private) int |
152 | calcOperation |
153 |
(package private) int |
156 | currentCalc |
157 |
(package private) javax.swing.JFrame |
160 | guiFrame |
161 |
(package private) javax.swing.JTextField |
164 | numberCalc |
165 |
| Constructor and Description | 179 |
|---|
Calculator()
182 | Consturct a new Calculator Frame.
183 | |
184 |
| Modifier and Type | 198 |Method and Description | 199 |
|---|---|
void |
202 | actionPerformed(java.awt.event.ActionEvent event) |
203 |
private void |
206 | addButton(java.awt.Container parent,
207 | java.lang.String name) |
208 |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitjavax.swing.JFrame guiFrame238 |
javax.swing.JPanel buttonPanel247 |
javax.swing.JTextField numberCalc256 |
int calcOperation265 |
int currentCalc274 |
public Calculator()291 |
EXIT_ON_CLOSE option. Positions the JFrame in
293 | the middle of the screen Also fills the UI with required components.private void addButton(java.awt.Container parent, 311 | java.lang.String name)312 |
parent - the main container of the component to be addedname - name of the JButton that is to be addedpublic void actionPerformed(java.awt.event.ActionEvent event)322 |
actionPerformed in interface java.awt.event.ActionListener| Class | 74 |Description | 75 |
|---|---|
| CalcLauncher | 79 |
80 | The main launcher for java calculator.
81 | |
82 |
Each package has a page that contains a list of its classes and interfaces, with a summary for each. This page can contain six categories:
73 |Each class, interface, nested class and nested interface has its own separate page. Each of these pages has three sections consisting of a class/interface description, summary tables, and detailed member descriptions:
85 |Each summary entry contains the first sentence from the detailed description for that item. The summary entries are alphabetical, while the detailed descriptions are in the order they appear in the source code. This preserves the logical groupings established by the programmer.
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109 |Each enum has its own separate page with the following sections:
120 |Each documented package, class and interface has its own Use page. This page describes what packages, classes, methods, constructors and fields use any part of the given class or package. Given a class or interface A, its Use page includes subclasses of A, fields declared as A, methods that return A, and methods and constructors with parameters of type A. You can access this page by first going to the package, class or interface, then clicking on the "Use" link in the navigation bar.
130 |There is a Class Hierarchy page for all packages, plus a hierarchy for each package. Each hierarchy page contains a list of classes and a list of interfaces. The classes are organized by inheritance structure starting with java.lang.Object. The interfaces do not inherit from java.lang.Object.
The Deprecated API page lists all of the API that have been deprecated. A deprecated API is not recommended for use, generally due to improvements, and a replacement API is usually given. Deprecated APIs may be removed in future implementations.
142 |The Index contains an alphabetic list of all classes, interfaces, constructors, methods, and fields.
146 |These links take you to the next or previous class, interface, package, or related page.
150 |These links show and hide the HTML frames. All pages are available with or without frames.
154 |The All Classes link shows all classes and interfaces except non-static nested types.
158 |Each serializable or externalizable class has a description of its serialization fields and methods. This information is of interest to re-implementors, not to developers using the API. While there is no link in the navigation bar, you can get to this information by going to any serialized class and clicking "Serialized Form" in the "See also" section of the class description.
162 |The <a href="constant-values.html">Constant Field Values</a> page lists the static final fields and their values.
166 |EXIT_ON_CLOSE option. Positions the JFrame in
29 | * the middle of the screen Also fills the UI with required components.
30 | */
31 | public Calculator() {
32 | guiFrame = new JFrame();
33 |
34 | guiFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
35 | guiFrame.setTitle("Simple Calculator");
36 | guiFrame.setSize(300, 300);
37 |
38 | guiFrame.setLocationRelativeTo(null);
39 |
40 | numberCalc = new JTextField();
41 | numberCalc.setHorizontalAlignment(JTextField.RIGHT);
42 | numberCalc.setEditable(false);
43 |
44 | guiFrame.add(numberCalc, BorderLayout.NORTH);
45 |
46 | buttonPanel = new JPanel();
47 |
48 | buttonPanel.setLayout(new GridLayout(5, 3));
49 | guiFrame.add(buttonPanel, BorderLayout.CENTER);
50 |
51 | // Add the number buttons
52 | for (int i = 1; i < 10; i++) {
53 | addButton(buttonPanel, String.valueOf(i));
54 | }
55 | addButton(buttonPanel, " ");
56 | addButton(buttonPanel, "0");
57 | addButton(buttonPanel, " ");
58 |
59 | JButton addButton = new JButton("+");
60 | addButton.setActionCommand("+");
61 |
62 | OperatorAction subAction = new OperatorAction(1);
63 | addButton.addActionListener(subAction);
64 |
65 | JButton subButton = new JButton("-");
66 | subButton.setActionCommand("-");
67 |
68 | OperatorAction addAction = new OperatorAction(2);
69 | subButton.addActionListener(addAction);
70 |
71 | JButton equalsButton = new JButton("=");
72 | equalsButton.setActionCommand("=");
73 | equalsButton.addActionListener(new ActionListener() {
74 | /* (non-Javadoc)
75 | * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
76 | */
77 | @Override
78 | public void actionPerformed(ActionEvent event) {
79 | if (!numberCalc.getText().isEmpty()) {
80 | int number = Integer.parseInt(numberCalc.getText());
81 | if (calcOperation == 1) {
82 | int calculate = currentCalc + number;
83 | numberCalc.setText(Integer.toString(calculate));
84 | } else if (calcOperation == 2) {
85 | int calculate = currentCalc - number;
86 | numberCalc.setText(Integer.toString(calculate));
87 | }
88 | }
89 | }
90 | });
91 |
92 | buttonPanel.add(addButton);
93 | buttonPanel.add(subButton);
94 | buttonPanel.add(equalsButton);
95 | guiFrame.setVisible(true);
96 | }
97 |
98 | /**
99 | * @param parent
100 | * the main container of the component to be added
101 | * @param name
102 | * name of the JButton that is to be added
103 | */
104 | private void addButton(Container parent, String name) {
105 | JButton but = new JButton(name);
106 | but.setActionCommand(name);
107 | but.addActionListener(this);
108 | parent.add(but);
109 | }
110 |
111 | /* (non-Javadoc)
112 | * As all the buttons are doing the same thing it's easier to make the class
113 | * implement the ActionListener interface and control the
114 | * button clicks from one place
115 | *
116 | * @see
117 | * java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
118 | */
119 | @Override
120 | public void actionPerformed(ActionEvent event) {
121 | String action = event.getActionCommand();
122 | numberCalc.setText(action);
123 | }
124 |
125 | /**
126 | * @author mtk
127 | *
128 | */
129 | private class OperatorAction implements ActionListener {
130 | private int operator;
131 |
132 | /**
133 | * @param operation
134 | */
135 | public OperatorAction(int operation) {
136 | operator = operation;
137 | }
138 |
139 | /* (non-Javadoc)
140 | * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
141 | */
142 | public void actionPerformed(ActionEvent event) {
143 | currentCalc = Integer.parseInt(numberCalc.getText());
144 | calcOperation = operator;
145 | }
146 | }
147 | }
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