java编写一个记事本小程序，接着下面的代码写，求大神解救！实现新建，保存，打开功能就行！

package tuxingjiemian;

import javaxswing;

import javaxswingevent;

import javaawt;

import javaawtevent;

import javaioFile;

import javaioPrintStream;

public class jishiben extends JFrame {

JPanel jp=new JPanel();

JFrame find_replace=new JFrame();

JMenu file=new JMenu("文件");

JMenu edit=new JMenu("编辑");

JMenu help=new JMenu("帮助");

JMenuBar menubar=new JMenuBar();

JTextArea aa=new JTextArea();

class Open implements ActionListener {

public void actionPerformed(ActionEvent e) {

JFileChooser jf= new JFileChooser();

jfshowOpenDialog(jishibenthis);

try {

PrintStream p=new PrintStream(jfgetSelectedFile()getPath());

} catch (Exception e2) {

}

}

}

class Save implements ActionListener {

public void actionPerformed(ActionEvent e) {

JFileChooser jf= new JFileChooser();

jfshowSaveDialog(jishibenthis);

try {

PrintStream p=new PrintStream(jfgetSelectedFile()getPath());

} catch (Exception e2) {

}

}

}

public jishiben(){

thissetTitle("记事本");

thissetSize(500, 500);

thissetLayout(new BorderLayout());

JMenuItem open=new JMenuItem("打开");

openaddActionListener(new Open());

JMenuItem save=new JMenuItem("保存");

saveaddActionListener(new Save());

JMenuItem exit=new JMenuItem("退出");

exitaddActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

Systemexit(0);

}

});

fileadd(open);

fileadd(save);

fileaddSeparator();

fileadd(exit);

menubaradd(file);

thisadd(new JScrollPane(aa),BorderLayoutCENTER);

JMenuItem copy=new JMenuItem("复制");

JMenuItem past=new JMenuItem("粘贴");

JMenuItem delete=new JMenuItem("删除");

JMenuItem find=new JMenuItem("查找");

JMenuItem replace=new JMenuItem("替换");

copyaddActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jishibenthisaacopy();

}

});

pastaddActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jishibenthisaapaste();

}

});

deleteaddActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

jishibenthisaareplaceSelection(null);

}

});

editadd(copy);

editadd(past);

editadd(delete);

editadd(find);

editadd(replace);

menubaradd(edit);

helpadd(new JMenuItem("帮助"));

menubaradd(help);

thisadd(menubar,BorderLayoutNORTH);

thissetVisible(true);

thissetDefaultCloseOperation(thisEXIT_ON_CLOSE);

}

public static void main(String[] args) {

new jishiben();

}

};

/////////////////////////

import javautil;

public class StudentTest {

int avPass = 90;

int pePass = 96;

int alPass = 150;

public static void main(String[] args) {

StudentTest st = new StudentTest();

Student s1 = new Student("tommy", 85, 96);

Student s2 = new Student("jimmy", 96, 68);

Student s3 = new Student("cherry", 96, 50);

stcheckPass(s1);

stcheckPass(s2);

stcheckPass(s3);

}

public void checkPass(Student s) {

if(sgetAverage() >= thisavPass) {

Systemoutprintln(sgetName() + "达到了录取平均线" + thisavPass + "分，被录取。");

} else if (sgetPeMark() >= thispePass && sgetTotal() >= thisalPass){

Systemoutprintln(sgetName() + "达到了体育录取分数线" + thispePass +

"分， 且综合达到了" + thisalPass + "分，被录取");

} else {

Systemoutprintln(sgetName() + "未达到录取要求！");

}

}

}

class Student{

private int peMark;

private int otherMark;

private String name;

public Student(){}

public Student(String na, int pe, int ot){

thispeMark = pe;

thisotherMark = ot;

thisname = na;

}

public String getName(){

return name;

}

public int getAverage(){

return (peMark + otherMark) / 2;

}

public int getPeMark(){

return peMark;

}

public int getTotal(){

return peMark + otherMark;

}

public String toString(){

return "姓名: " + name + "\n体育成绩：" + peMark

+ "\n其他成绩：" + otherMark + "\n平均成绩：" + getAverage();

}

}

////////////output:

tommy达到了录取平均线90分，被录取。

jimmy达到了体育录取分数线96分， 且综合达到了150分，被录取

cherry未达到录取要求！

import javaawt;

import javaapplet;

import javaawtevent;

public class L07_D extends Applet implements ActionListener{

public void init() {

Button one;

Button two;

one = new Button("Button one");

two = new Button("Button two");

add(one);add(two);

oneaddActionListener(this);

twoaddActionListener(this);

}

public void actionPerformed(ActionEvent e) {

showStatus("One of my buttons was clicked");

}

}

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