Create小程序

我有时候喜欢直接用命令行创建、编译、执行java文件，每次创建一个文件都要新建一个.java文件,然后再编辑.java文件加入类名，主函数……

这些流程我有点厌倦，于是就编写了一个超级简单的自动创建工具。下面贴出代码：

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.util.HashMap;

import java.util.Map;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.border.EmptyBorder;

public class Create extends JFrame {

    private String classname;

    private JPanel contentPane;

    private JTextField textField;

    private JLabel lblNewLabel_1;

    private JButton btnNewButton_1;

    private JButton btnNewButton_2;

    /**

     * Launch the application.

     */

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            public void run() {

                try {

                    Create frame = new Create();

                    frame.setVisible(true);

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

        });

    }

    /**

     * Create the frame.

     */

    public Create() {

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setBounds(100, 100, 450, 300);

        contentPane = new JPanel();

        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

        setContentPane(contentPane);

        contentPane.setLayout(null);

        JLabel lblNewLabel = new JLabel("Class name:");

        lblNewLabel.setBounds(49, 0, 93, 42);

        contentPane.add(lblNewLabel);

        textField = new JTextField();

        textField.setBounds(170, 7, 212, 26);

        contentPane.add(textField);

        textField.setColumns(10);

        lblNewLabel_1 = new JLabel("");

        lblNewLabel_1.setBounds(49, 34, 333, 18);

        contentPane.add(lblNewLabel_1);        

        JButton btnNewButton = new JButton("create");

        btnNewButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                try {

                    classname = textField.getText();

                    if(classname.equals("")){

                        lblNewLabel_1.setText("请输入需要创建的类名！");

                    }else{

                        PrintWriter out = new PrintWriter(new File(classname+".java"));

                        String str = "class "+classname+"{\n\tpublic "+classname+"(){}\n\tpublic static void main(String[] args){\n\t// TODO Auto-generated method stub\n\n\t}\n}";

                        out.print(str);

                        out.close();

                        textField.setText("");

                        lblNewLabel_1.setText(classname+".java 创建成功");

                    }

                } catch (FileNotFoundException e1) {

                    // TODO Auto-generated catch block

                    JOptionPane.showMessageDialog(getComponent(0), "创建失败");

                }

            }

        });

        btnNewButton.setBounds(275, 62, 107, 23);

        contentPane.add(btnNewButton);

        JScrollPane scrollPane = new JScrollPane();

        scrollPane.setBounds(10, 95, 414, 156);

        contentPane.add(scrollPane);

        JTextArea textArea = new JTextArea();

        scrollPane.setViewportView(textArea);

        btnNewButton_1 = new JButton("javac编译");

        btnNewButton_1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                if(classname.equals("")){

                    lblNewLabel_1.setText("你还没有创建类文件！");

                }else{

                    final Map<String, String> env = new HashMap<String, String>(System.getenv());

                    final String[] strings=mapToStringArray(env);

                    BufferedReader reader=null;

                    Process p;

                    String error="";

                    try {

                        p = Runtime.getRuntime().exec("cmd /c javac "+classname+".java",strings);

                        p.waitFor();

                        reader=new BufferedReader(new InputStreamReader(p.getErrorStream()));

                        String line;

                        while((line = reader.readLine()) != null)

                        {

                            error+=line+"\n";

                        }

                    } catch (Exception e1) {

                        // TODO Auto-generated catch block

                        System.out.println("编译程序出错");

                    }

                    if(error.equals("")){

                        textArea.setText("编译成功。");

                    }else{

                        textArea.setText(error);

                    }

                }

            }

        });

        btnNewButton_1.setBounds(38, 62, 93, 23);

        contentPane.add(btnNewButton_1);

        btnNewButton_2 = new JButton("java运行");

        btnNewButton_2.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                final Map<String, String> env = new HashMap<String, String>(System.getenv());

                final String[] strings=mapToStringArray(env);

                BufferedReader reader=null;

                Process p;

                String error="";

                String success="";

                try {

                    p = Runtime.getRuntime().exec("cmd /c java "+classname,strings);

                    p.waitFor();

                    reader=new BufferedReader(new InputStreamReader(p.getErrorStream()));

                    String line;

                    while((line = reader.readLine()) != null)

                    {

                        error+=line+"\n";

                    }

                    if(error.equals("")){

                        reader=new BufferedReader(new InputStreamReader(p.getInputStream()));

                        while((line = reader.readLine()) != null)

                        {

                            success+=line+"\n";

                        }

                    }

                } catch (Exception e1) {

                    // TODO Auto-generated catch block

                    System.out.println("运行程序出错");

                }

                if(error.equals("")){

                    textArea.setText("运行成功.\n"+success);

                }else{

                    textArea.setText(error);

                }

            }

        });

        btnNewButton_2.setBounds(159, 62, 93, 23);

        contentPane.add(btnNewButton_2);

        this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);

    }

    String[] mapToStringArray(Map<String, String> map) {

        final String[] strings = new String[map.size()];

        int i = 0;

        for (Map.Entry<String, String> e : map.entrySet()) {

            strings[i] = e.getKey() + '=' + e.getValue();

            i++;

        }

        return strings;

    }

}

程序运行图：

我们在Class name栏目输入我们需要创建的类名。

点击create按钮后就会在当前路径下生成Hello.java文件。文件内容是：

class Hello{

    public Hello(){}

    public static void main(String[] args){

    // TODO Auto-generated method stub

    }

}

然后我们在源文件中添加一行测试代码：System.out.println("hello");

class Hello{

    public Hello(){}

    public static void main(String[] args){

    // TODO Auto-generated method stub

        System.out.println("hello");

    }

}

点击编译就能编译成功生成.class文件。

点击运行就能出现运行结果：

虽然很简单，但是还是挺实用的，以后每次就用它来创建我的类文件了，O(∩_∩)O！

当然也可以写几行脚本来完成这个小小的功能……

巴特西

Create小程序

最新文章

热门文章