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1
19
20 package examples.advanced;
21
22 import java.awt.Dimension  ;
23 import java.awt.Toolkit ;
24 import java.awt.event.ActionListener ;
25 import java.awt.event.ActionEvent ;
26
27 import java.text.MessageFormat ;
28 import java.util.ResourceBundle ;
29
30 import javax.swing.Timer ;
31
32
37 public class MemoryView extends javax.swing.JFrame {
38
39 private static ResourceBundle bundle = ResourceBundle.getBundle ("examples.advanced.MemoryViewLocale");
40
41 private static MessageFormat msgMemory = new MessageFormat (bundle.getString ("TXT_STATUS"));
42
43
44 private static final int UPDATE_TIME = 1000;
45
46 private Timer timer;
47
48
49
50 public MemoryView() {
51 initComponents ();
52
53 setTitle (bundle.getString ("TXT_TITLE"));
54 doGarbage.setText (bundle.getString ("TXT_GARBAGE"));
55 doRefresh.setText (bundle.getString ("TXT_REFRESH"));
56 doClose.setText (bundle.getString ("TXT_CLOSE"));
57
58 txtTime.setText (bundle.getString ("TXT_TIME"));
59 doTime.setText (bundle.getString ("TXT_SET_TIME"));
60 time.setText (String.valueOf (UPDATE_TIME));
61 time.selectAll ();
62 time.requestFocus ();
63
64 updateStatus ();
65
66 timer = new Timer (UPDATE_TIME, new ActionListener () {
67 public void actionPerformed (ActionEvent ev) {
68 updateStatus ();
69 }
70 });
71 timer.setRepeats (true);
72
73 pack ();
74 }
75
76
78 public void addNotify () {
79 super.addNotify ();
80 timer.start ();
81 }
82
83
85 public void removeNotify () {
86 super.removeNotify ();
87 timer.stop ();
88 }
89
90
91 private void updateStatus () {
92 Runtime r = Runtime.getRuntime ();
93 long free = r.freeMemory ();
94 long total = r.totalMemory ();
95
96 while (total > Integer.MAX_VALUE) {
98 total = total >> 1;
99 free = free >> 1;
100 }
101
102 int taken = (int) (total - free);
103
104 status.setMaximum ((int)total);
105 status.setValue (taken);
106
107 text.setText (msgMemory.format (new Object [] {
108 new Long (total),
109 new Long (free),
110 new Integer (taken)
111 }));
112 text.invalidate ();
113 validate ();
114 }
115
116
121 private void initComponents() { jPanel1 = new javax.swing.JPanel ();
123 text = new javax.swing.JLabel ();
124 status = new javax.swing.JProgressBar ();
125 jPanel2 = new javax.swing.JPanel ();
126 doGarbage = new javax.swing.JButton ();
127 doRefresh = new javax.swing.JButton ();
128 doClose = new javax.swing.JButton ();
129 jPanel3 = new javax.swing.JPanel ();
130 txtTime = new javax.swing.JLabel ();
131 time = new javax.swing.JTextField ();
132 doTime = new javax.swing.JButton ();
133
134 addWindowListener(new java.awt.event.WindowAdapter () {
135 public void windowClosing(java.awt.event.WindowEvent evt) {
136 exitForm(evt);
137 }
138 });
139
140 jPanel1.setLayout(new java.awt.BorderLayout ());
141
142 jPanel1.add(text, java.awt.BorderLayout.SOUTH);
143
144 jPanel1.add(status, java.awt.BorderLayout.CENTER);
145
146 getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);
147
148 doGarbage.addActionListener(new java.awt.event.ActionListener () {
149 public void actionPerformed(java.awt.event.ActionEvent evt) {
150 doGarbageActionPerformed(evt);
151 }
152 });
153
154 jPanel2.add(doGarbage);
155
156 doRefresh.addActionListener(new java.awt.event.ActionListener () {
157 public void actionPerformed(java.awt.event.ActionEvent evt) {
158 doRefreshActionPerformed(evt);
159 }
160 });
161
162 jPanel2.add(doRefresh);
163
164 doClose.addActionListener(new java.awt.event.ActionListener () {
165 public void actionPerformed(java.awt.event.ActionEvent evt) {
166 doCloseActionPerformed(evt);
167 }
168 });
169
170 jPanel2.add(doClose);
171
172 getContentPane().add(jPanel2, java.awt.BorderLayout.SOUTH);
173
174 jPanel3.setLayout(new java.awt.BorderLayout (0, 20));
175
176 jPanel3.add(txtTime, java.awt.BorderLayout.WEST);
177
178 jPanel3.add(time, java.awt.BorderLayout.CENTER);
179
180 doTime.addActionListener(new java.awt.event.ActionListener () {
181 public void actionPerformed(java.awt.event.ActionEvent evt) {
182 setRefreshTime(evt);
183 }
184 });
185
186 jPanel3.add(doTime, java.awt.BorderLayout.EAST);
187
188 getContentPane().add(jPanel3, java.awt.BorderLayout.NORTH);
189
190 }
192
193 private void exitForm (java.awt.event.WindowEvent evt) { System.exit( 0 );
195 }
197 private void setRefreshTime (java.awt.event.ActionEvent evt) { try {
199 int rate = Integer.valueOf (time.getText ()).intValue ();
200 timer.setDelay (rate);
201 } catch (NumberFormatException ex) {
202 time.setText (String.valueOf (timer.getDelay ()));
203 }
204 time.selectAll ();
205 time.requestFocus ();
206 }
208
209 private void doCloseActionPerformed (java.awt.event.ActionEvent evt) { exitForm (null);
211 }
213
214 private void doRefreshActionPerformed (java.awt.event.ActionEvent evt) { updateStatus ();
216 }
218 private void doGarbageActionPerformed (java.awt.event.ActionEvent evt) { System.gc ();
220 updateStatus ();
221 }
223
224 private javax.swing.JProgressBar status;
226 private javax.swing.JTextField time;
227 private javax.swing.JLabel txtTime;
228 private javax.swing.JButton doGarbage;
229 private javax.swing.JButton doClose;
230 private javax.swing.JButton doTime;
231 private javax.swing.JPanel jPanel3;
232 private javax.swing.JPanel jPanel2;
233 private javax.swing.JPanel jPanel1;
234 private javax.swing.JButton doRefresh;
235 private javax.swing.JLabel text;
236
238
239
241 public static void main(java.lang.String [] args) {
242 MemoryView mv = new MemoryView ();
243 Dimension d = Toolkit.getDefaultToolkit ().getScreenSize ();
244 Dimension m = mv.getSize ();
245 d.width -= m.width;
246 d.height -= m.height;
247 d.width /= 2;
248 d.height /= 2;
249 mv.setLocation (d.width, d.height);
250 mv.setVisible (true);
251 }
252
253 }
254 |
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