学步园

在网上看到了一个小程序,修改了其中的bug(主要是没有关闭一些InputStreamReader之类的东西)

修改为可以查找重复字符串,不仅仅是手机号.测试了一个文件,50万条带重复字符串的文件(每行一串字符,是移动的号段表)耗时 2515毫秒,实际效率应该比这个低,因为号段已经排过序了.

代码如下:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Vector;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

/** *//**
 * 
 * 
 * 
 * @author
 * @modify hallywang 2006-11-18
 * 
 */

public class Main extends javax.swing.JFrame ...{

    /** *//**
     * 
     */
    private static final long serialVersionUID = 1L;

    private Vector vectors = new Vector();

    String[] resultArr = null;

    /** *//** Creates new form Main */

    public Main() ...{

        initComponents();

        this.setSize(405, 400);

        this.setTitle("电话号码查询");

        this.setResizable(false);

    }

    /** *//**
     * 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.
     * 
     */

    // //GEN-BEGIN:initComponents
    private void initComponents() ...{

        jFileChooser1 = new JFileChooser();

        desktopPane = new javax.swing.JDesktopPane();

        jPanel1 = new javax.swing.JPanel();

        jScrollPane1 = new javax.swing.JScrollPane();

        jScrollPane2 = new javax.swing.JScrollPane();

        jTextArea1 = new javax.swing.JTextArea();

        jTextArea2 = new javax.swing.JTextArea();

        menuBar = new javax.swing.JMenuBar();

        fileMenu = new javax.swing.JMenu();

        openMenuItem = new javax.swing.JMenuItem();

        saveMenuItem = new javax.swing.JMenuItem();

        saveAsMenuItem = new javax.swing.JMenuItem();

        exitMenuItem = new javax.swing.JMenuItem();

        editMenu = new javax.swing.JMenu();

        cutMenuItem = new javax.swing.JMenuItem();

        copyMenuItem = new javax.swing.JMenuItem();

        pasteMenuItem = new javax.swing.JMenuItem();

        deleteMenuItem = new javax.swing.JMenuItem();

        helpMenu = new javax.swing.JMenu();

        contentMenuItem = new javax.swing.JMenuItem();

        aboutMenuItem = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setLayout(new java.awt.BorderLayout());

        jTextArea1.setColumns(35);

        jTextArea1.setRows(15);

        jTextArea1.setTabSize(4);

        jScrollPane1.setViewportView(jTextArea1);

        jPanel1.add(jScrollPane1, java.awt.BorderLayout.CENTER);

        jTextArea2.setColumns(35);

        jTextArea2.setRows(5);

        jScrollPane2.setViewportView(jTextArea2);

        jPanel1.add(jScrollPane2, java.awt.BorderLayout.SOUTH);

        jPanel1.setBounds(0, 0, 400, 280);

        desktopPane.add(jPanel1, javax.swing.JLayeredPane.DEFAULT_LAYER);

        getContentPane().add(desktopPane, java.awt.BorderLayout.CENTER);

        fileMenu.setText("文件");

        fileMenu.addActionListener(new java.awt.event.ActionListener() ...{

            public void actionPerformed(java.awt.event.ActionEvent evt) ...{

                fileMenuActionPerformed(evt);

            }

        });

        openMenuItem.setText("打开");

        openMenuItem.addActionListener(new java.awt.event.ActionListener() ...{

            public void actionPerformed(java.awt.event.ActionEvent evt) ...{

                openMenuItemActionPerformed(evt);

            }

        });

        fileMenu.add(openMenuItem);

        saveMenuItem.setText("保存");

        saveMenuItem.addActionListener(new java.awt.event.ActionListener() ...{

            public void actionPerformed(java.awt.event.ActionEvent evt) ...{

                saveMenuItemActionPerformed(evt);

            }

        });

        fileMenu.add(saveMenuItem);

        // saveAsMenuItem.setText("Save As ...");

        // fileMenu.add(saveAsMenuItem);

        exitMenuItem.setText("Exit");

        exitMenuItem.addActionListener(new java.awt.event.ActionListener() ...{

            public void actionPerformed(java.awt.event.ActionEvent evt) ...{

                exitMenuItemActionPerformed(evt);

            }

        });

        fileMenu.add(exitMenuItem);

        menuBar.add(fileMenu);

        editMenu.setText("Edit");

        cutMenuItem.setText("Cut");

        editMenu.add(cutMenuItem);

        copyMenuItem.setText("Copy");

        editMenu.add(copyMenuItem);

        pasteMenuItem.setText("Paste");

        editMenu.add(pasteMenuItem);

        deleteMenuItem.setText("Delete");

        editMenu.add(deleteMenuItem);

        menuBar.add(editMenu);

        helpMenu.setText("Help");

        contentMenuItem.setText("Contents");

        helpMenu.add(contentMenuItem);

        aboutMenuItem.setText("About");

        aboutMenuItem.addActionListener(new java.awt.event.ActionListener() ...{

            public void actionPerformed(java.awt.event.ActionEvent evt) ...{

                aboutMenuItemActionPerformed(evt);

            }

        });

        helpMenu.add(aboutMenuItem);

        menuBar.add(helpMenu);

        setJMenuBar(menuBar);

        pack();

    }

    // //GEN-END:initComponents

    private void aboutMenuItemActionPerformed(java.awt.event.ActionEvent evt) ...{// GEN-FIRST:event_aboutMenuItemActionPerformed

        // TODO 将在此处添加您的处理代码：

        JOptionPane.showMessageDialog(null, "Find Phone Num by repeated.",
                "关于", JOptionPane.WARNING_MESSAGE);

    }// GEN-LAST:event_aboutMenuItemActionPerformed

    private void openMenuItemActionPerformed(java.awt.event.ActionEvent evt) ...{// GEN-FIRST:event_openMenuItemActionPerformed
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