import = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel();
import java.awt.Color;public class checkSUM extends javax.swing.JFrame { public checkSUM() { initComponents(); } @SuppressWarnings(“unchecked”) // private void initComponents() { jPanel1 = new javax.swing.JPanel(); jScrollPane1 = new javax.swing.JScrollPane(); logarea = new javax.swing.JTextArea(); jScrollPane2 = new javax.swing.JScrollPane(); logarea2 = new javax.swing.JTextArea(); jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); sent = new javax.swing.JTextField(); recived = new javax.swing.JTextField(); checkBTN = new javax.swing.JButton(); log = new javax.swing.JLabel(); jLabel4 = new javax.swing.JLabel(); jLabel5 = new javax.swing.JLabel(); jLabel3 = new javax.swing.JLabel(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle(“CheckSum”); setBackground(new java.awt.Color(255, 102, 51)); jPanel1.setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR)); jScrollPane1.setBorder(null); jScrollPane1.setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); jScrollPane1.setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER); logarea.setEditable(false); logarea.setColumns(20); logarea.setRows(5); jScrollPane1.setViewportView(logarea); jScrollPane2.setBorder(null); jScrollPane2.setHorizontalScrollBarPolicy(javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); logarea2.setEditable(false); logarea2.setColumns(20); logarea2.setRows(5); jScrollPane2.setViewportView(logarea2); jLabel1.setFont(new java.awt.Font(“Tahoma”, 0, 14)); // NOI18N jLabel1.setForeground(new java.awt.Color(51, 51, 51)); jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); jLabel1.setText(“Sent”); jLabel2.setFont(new java.awt.Font(“Tahoma”, 0, 14)); // NOI18N jLabel2.setForeground(new java.awt.Color(51, 51, 51)); jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); jLabel2.setText(“Recived”); sent.setBorder(null); sent.setMargin(new java.awt.Insets(10, 2, 2, 2)); sent.setName(“sent”); // NOI18N recived.setBorder(null); recived.setName(“recived”); // NOI18N checkBTN.setFont(new java.awt.Font(“Tahoma”, 0, 14)); // NOI18N checkBTN.setText(“Check”); checkBTN.setBorder(null); checkBTN.setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR)); checkBTN.setName(“btn”); // NOI18N checkBTN.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { checkBTNActionPerformed(evt); } }); log.setText(“LOG MESSAGE”); jLabel4.setText(“Log”); jLabel5.setText(“Math Log”); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(log, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup() .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 195, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 55, Short.MAX_VALUE) .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 195, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(jPanel1Layout.createSequentialGroup() .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(141, 141, 141) .addComponent(jLabel5, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(jPanel1Layout.createSequentialGroup() .addContainerGap() .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(checkBTN, javax.swing.GroupLayout.PREFERRED_SIZE, 134, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 64, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(sent, javax.swing.GroupLayout.PREFERRED_SIZE, 310, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(jPanel1Layout.createSequentialGroup() .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 64, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(recived, javax.swing.GroupLayout.PREFERRED_SIZE, 310, javax.swing.GroupLayout.PREFERRED_SIZE)))))) .addGap(0, 0, Short.MAX_VALUE)) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(21, 21, 21) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(sent, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(18, 18, 18) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(recived, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(13, 13, 13) .addComponent(checkBTN, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addComponent(log) .addGap(31, 31, 31) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jLabel4) .addComponent(jLabel5)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jScrollPane2, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addContainerGap(26, Short.MAX_VALUE)) ); jLabel3.setBackground(new java.awt.Color(255, 255, 255)); jLabel3.setFont(new java.awt.Font(“Cordia New”, 0, 36)); // NOI18N jLabel3.setForeground(new java.awt.Color(51, 51, 51)); jLabel3.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); jLabel3.setText(“CHECKSUM”); jLabel3.setName(“title”); // NOI18N javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(75, 75, 75) .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 445, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(43, Short.MAX_VALUE)) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(57, 57, 57)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(45, 45, 45) .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 67, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); pack(); }// int generateChecksum(String s) { String hex_value = new String(); // ‘hex_value’ will be used to store various hex values as a string int x, i, checksum=0; for(i=0 ; i < s.length()-2 ; i=i+2) { x = (int) (s.charAt(i)); hex_value = Integer.toHexString(x); x = (int) (s.charAt(i+1)); hex_value = hex_value + Integer.toHexString(x); logarea2.append(s.charAt(i)+""+s.charAt(i+1) + " : "+ hex_value+"
"); x = Integer.parseInt(hex_value, 16); checksum += x; } if(s.length()%2 == 0) { x = (int) (s.charAt(i)); hex_value = Integer.toHexString(x); x = (int) (s.charAt(i+1)); hex_value = hex_value + Integer.toHexString(x); logarea2.append(s.charAt(i)+""+s.charAt(i+1) + " : " + hex_value+"
"); x = Integer.parseInt(hex_value, 16); } else { x = (int) (s.charAt(i)); hex_value = "00" + Integer.toHexString(x); x = Integer.parseInt(hex_value, 16); logarea2.append(s.charAt(i) + " : " + hex_value+"
"); } checksum += x; hex_value = Integer.toHexString(checksum); if(hex_value.length() > 4) { int carry = Integer.parseInt((“”+hex_value.charAt(0)), 16); hex_value = hex_value.substring(1,5); checksum = Integer.parseInt(hex_value, 16); checksum += carry; } checksum = generateComplement(checksum); return checksum; } static int generateComplement(int checksum) { checksum = Integer.parseInt(“FFFF”, 16) – checksum; return checksum; } private void checkBTNActionPerformed(java.awt.event.ActionEvent evt) { logarea2.setText(“”); logarea2.append(“>>Data Sent<<
"); String sentData = sent.getText(); int Sentchecksum = generateChecksum(sentData); logarea.setText("CheckSUM for sent data: "+Integer.toHexString(Sentchecksum)); logarea2.append("---------------------------
"); logarea2.append(">>Data recived<<
"); String recivedData = recived.getText(); int recivedchecksum = generateChecksum(recivedData); logarea.append("
CheckSUM for sent data: "+Integer.toHexString(recivedchecksum)); if(Sentchecksum == recivedchecksum){ log.setText("Data Recived correctly"); logarea.append("
"+Sentchecksum+" = "+recivedchecksum); logarea.append("
Data Recived correctly"); log.setForeground(Color.DARK_GRAY); } else{ log.setText("There is an error"); logarea.append("
"+Sentchecksum+" != "+recivedchecksum); logarea.append("
There is an error"); log.setForeground(Color.red); } } public static void main(String args) { /* Set the Nimbus look and feel */ // /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if (“Nimbus”.equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(checkSUM.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(checkSUM.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(checkSUM.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(checkSUM.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } // java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new checkSUM().setVisible(true); } }); } // Variables declaration – do not modify private javax.swing.JButton checkBTN; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JLabel jLabel5; private javax.swing.JPanel jPanel1; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JScrollPane jScrollPane2; private javax.swing.JLabel log; private javax.swing.JTextArea logarea; private javax.swing.JTextArea logarea2; private javax.swing.JTextField recived; private javax.swing.JTextField sent; // End of variables declaration }
