ping.java

运用Java实现一个Ping程序

/*
 * Ping.java
 *
 * Created on 2008年5月24日, 下午3:15
 */

package 实验五;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
 

/**
 *
 * @author  jsj
 */
public class Ping extends javax.swing.JFrame {
    
    /** Creates new form Ping */
    public Ping() {
        initComponents();
    }
        private static final String windowsCommand = "ping";
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jTextField1 = new javax.swing.JTextField();
        jLabel1 = new javax.swing.JLabel();
        jButtonOk = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        jList1 = new javax.swing.JList();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTextField1.setText("202.202.243.2");
        jTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField1ActionPerformed(evt);
            }
        });

        jLabel1.setFont(new java.awt.Font("宋体", 0, 18));
        jLabel1.setText("Ip地址：");

        jButtonOk.setFont(new java.awt.Font("宋体", 0, 14));
        jButtonOk.setText("确定");
        jButtonOk.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButtonOkActionPerformed(evt);
            }
        });

        jList1.setModel(new javax.swing.AbstractListModel() {
            String[] strings = { "" };
            public int getSize() { return strings.length; }
            public Object getElementAt(int i) { return strings[i]; }
        });
        jScrollPane1.setViewportView(jList1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(11, 11, 11)
                        .addComponent(jLabel1)
                        .addGap(18, 18, 18)
                        .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 223, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jButtonOk))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(31, 31, 31)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 393, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(76, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(21, 21, 21)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jButtonOk)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 207, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(29, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jTextField1ActionPerformed
        // TODO add your handling code here:
    }//GEN-LAST:event_jTextField1ActionPerformed

    private void jButtonOkActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButtonOkActionPerformed
         // TODO add your handling code here:
  try{
      final String os=System.getProperty("os");
      String command=windowsCommand+' '+jTextField1.getText();
      final Process process = Runtime.getRuntime().exec(command);
      BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
         String[]result =new String[100];
         int i=0;
        for (String line = null; (line = reader.readLine()) != null;) {
//          将line按给定模式创建一个匹配器       
              result[i++]=line; 
           jList1.setListData(result);
        }} catch (IOException ex) {
            System.out.println(ex);
        }
    }//GEN-LAST:event_jButtonOkActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Ping().setVisible(true);
            }
        });
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButtonOk;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JList jList1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration//GEN-END:variables
    
}