FileDialog 使用方法---JAVA

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创建一个具有指定标题的文件对话框窗口，用于加载或保存文件

FileDialog(Frame parent, String title, int mode)

int mode 有SAVE（保存）和LOAD（读写）两种

getDirectory()+getFile() = 文件路径

import java.awt.FileDialog;import java.awt.Frame;import java.io.BufferedReader;import java.io.FileOutputStream;import java.io.FileReader;import java.io.IOException;import java.io.PrintStream;public class FileOpen {    private Frame jf;    private PrintStream jtext;    public static void main(String[] args) throws Exception {        FileOpen hj = new FileOpen();        hj.open();        hj.save();    }    public void save() throws Exception{        FileDialog fd = new FileDialog(jf, "另存为", FileDialog.SAVE);        fd.setVisible(true);        FileOutputStream out = new FileOutputStream(fd.getDirectory() + fd.getFile() + ".txt" );        Object jtext;        String str = null;        out.write(str.getBytes());        out.close();    }    public void open() throws Exception {        FileDialog fdopen = new FileDialog(jf, "打开", FileDialog.LOAD);        fdopen.setVisible(true);        BufferedReader in = new BufferedReader(new FileReader(fdopen.getDirectory() + fdopen.getFile()));        String str = null;        while((str = in.readLine()) != null) {            System.out.println(str);            jtext.append(str + "\n");        }        in.close();    }}

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