一个成绩显示的JAVA小程序_CMS教程

import javautilScanner;

public class result {

public result() {

}

public static void main(String args[]) throws javaioIOException {

Scanner sc = new Scanner(Systemin);

int x = scnextInt();

if (x >= 90)

Systemoutprintln("A");

else if (x >= 80 && x < 90)

Systemoutprintln("B");

else if (x >= 70 && x < 80)

Systemoutprintln("C");

else if (x >= 60 && x < 70)

Systemoutprintln("D");

else

Systemoutprintln("E");

}

分类: 电脑/网络 >> 程序设计 >> 其他编程语言

问题描述:

我们修的汇编语言是JAVA,怎奈自己学术不精现在此象高手请教小程序是期末做课程设计用的题目有日历记事本,学籍管理系统,计算器,画图程序其他的也可以现需要两个程序,谢谢大家!

解析:

import javaio;

import javautilCalendar;

import javaawt;

import javaawtevent;

import javaxswing;

public class NoteBook extends JFrame implements ActionListener,ItemListener,WindowListener,MouseListener{

Container c = thisgetContentPane();

JMenuBar jmb = new JMenuBar();

JColorChooser jcc = new JColorChooser();

JMenu jm1 = new JMenu("文件(F)");

JMenu jm2 = new JMenu("编辑(E)");

JMenu jm3 = new JMenu("格式(O)");

JMenu jm4 = new JMenu("查看(V)");

JMenu jm5 = new JMenu("帮助(H)");

JMenuItem jmi1 = new JMenuItem("新建(N)");

JMenuItem jmi2 = new JMenuItem("打开(O)");

JMenuItem jmi3 = new JMenuItem("保存(S)");

JMenuItem jmi4 = new JMenuItem("退出(X)");

JMenuItem jmi5 = new JMenuItem("撤消(U)");

JMenuItem jmi6 = new JMenuItem("复制(C)");

JMenuItem jmi7 = new JMenuItem("粘贴(P)");

JMenuItem jmi8 = new JMenuItem("剪切(T)");

JMenuItem jmi12 = new JMenuItem("日期和时间");

JMenuItem jmi9 = new JMenuItem("字体(E)");

JCheckBoxMenuItem jcbmi = new JCheckBoxMenuItem("自动换行(W)");

JMenuItem jmi10 = new JMenuItem("删除(S)");

JMenuItem jmi11 = new JMenuItem("背景颜色(H)");

JTextArea jta = new JTextArea(15,15);

JScrollPane jsp = new JScrollPane(jta);

PupolMenu pm = new Pupolmenu();

NoteBook(){

thisaddWindowListener(this);

csetLayout(new BorderLayout());

cadd(jmb,BorderLayoutNORTH);

thissetTitle("新建文本文档");

jmbadd(jm1);

jm1setMnemonic('f');

jm1addActionListener(this);

jmbadd(jm2);

jm2setMnemonic('e');

jmbadd(jm3);

jm3setMnemonic('o');

jmbadd(jm4);

jm4setMnemonic('v');

jmbadd(jm5);

jm5setMnemonic('h');

jm1add(jmi1);

jmi1addActionListener(this);

jmi1setAccelerator(KeyStrokegetKeyStroke('N',EventCTRL_MASK,false));

jm1addSeparator();

jm1add(jmi2);

jmi2setAccelerator(KeyStrokegetKeyStroke('O',EventCTRL_MASK,false));

jmi2addActionListener(this);

jm1addSeparator();

jm1add(jmi3);

jmi3setAccelerator(KeyStrokegetKeyStroke('S',EventCTRL_MASK,false));

jmi3addActionListener(this);

jm1addSeparator();

jm1add(jmi4);

jmi1setMnemonic('n');

jmi2setMnemonic('o');

jmi3setMnemonic('s');

jmi4setMnemonic('x');

jmi4addActionListener(this);

jm2add(jmi5);

jm2addSeparator();

jm2add(jmi6);

jm2addSeparator();

jm2add(jmi7);

jm2addSeparator();

jm2add(jmi8);

jm2add(jmi12);

jmi12addActionListener(this);

jm3add(jcbmi);

jcbmiaddItemListener(this);

jm3addSeparator();

jm3add(jmi9);

jm4add(jmi10);

jmi10addActionListener(this);

jm5add(jmi11);

jmi11addActionListener(this);

cadd(jsp);

thissetDefaultCloseOperation(JFrameDISPOSE_ON_CLOSE);

thissetSize(500,500);

thissetVisible(true);

}

public void actionPerformed(ActionEvent e){

if(egetSource()==jmi1){

jtasetText("");

thissetTitle("无标题 - 记事本");

}

if(egetSource()==jmi2){

File f1;

JFileChooser jfc1 = new JFileChooser();

int num1 = jfc1showOpenDialog(this);

if(num1==JFileChooserAPPROVE_OPTION){

try{

f1 = jfc1getSelectedFile();

thissetTitle(f1getName());

FileReader fr = new FileReader(f1);

BufferedReader br = new BufferedReader(fr);

String str;

while((str = brreadLine())!=null){

jtasetText(str);

}

frclose();

brclose();

}catch(FileNotFoundException e1){

e1printStackTrace();

}catch(IOException e2){

e2printStackTrace();

}

if(egetSource()==jmi3){

File f2 = null;

JFileChooser jfc2 = new JFileChooser();

int num2 = jfc2showSaveDialog(this);

if(num2==JFileChooserAPPROVE_OPTION){

f2=jfc2getSelectedFile();

thissetTitle(f2getName());

try{

FileWriter fw = new FileWriter(f2);

BufferedWriter bw = new BufferedWriter(fw);

bwwrite(jtagetText());

bwclose();

fwclose();

}catch(IOException e2){

e2printStackTrace();

}

if(egetSource()==jmi4){

int a = JOptionPaneshowConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPaneYES_NO_CANCEL_OPTION);

if(a==1){

thisdispose();

}else if(a==0){

File f2 = null;

JFileChooser jfc2 = new JFileChooser();

int num2 = jfc2showSaveDialog(this);

if(num2==JFileChooserAPPROVE_OPTION){

f2=jfc2getSelectedFile();

thissetTitle(f2getName());

try{

FileWriter fw = new FileWriter(f2);

BufferedWriter bw = new BufferedWriter(fw);

bwwrite(jtagetText());

bwclose();

fwclose();

}catch(IOException e2){

e2printStackTrace();

}

thisdispose();

}

if(egetSource()==jmi12){

Calendar c1 =CalendargetInstance();

int y = c1get(CalendarYEAR);

int m = c1get(CalendarMONTH);

int d = c1get(CalendarDATE);

int h = c1get(CalendarHOUR);

int m1 = c1get(CalendarMINUTE);

int m2 = m+1;

jtasetText(y+"年"+m2+"月"+d+"日"+h+":"+m1);

}

if(egetSource()==jmi11){

Color ccc = JColorChoosershowDialog(this,"color",ColorBLACK);

jtasetSelectedTextColor(ccc);

jtasetBackground(ccc);

}

if(egetSource()==jmi10){

jtareplaceRange("",jtagetSelectionStart(),jtagetSelectionEnd());

}

public void itemStateChanged(ItemEvent e2){

if(e2getItemSelectable()==jcbmi){

jtasetLineWrap(true);

}else

jtasetLineWrap(false);

}

public static void main(String[] args){

new NoteBook();

}

public void windowOpened(WindowEvent arg0) {

}

public void windowClosing(WindowEvent arg0) {

int a = JOptionPaneshowConfirmDialog(this,"文件已被改变，是否要保存？","提示",JOptionPaneYES_NO_CANCEL_OPTION);

if(a==1){

thisdispose();

}else if(a==0){

File f2 = null;

JFileChooser jfc2 = new JFileChooser();

int num2 = jfc2showSaveDialog(this);

if(num2==JFileChooserAPPROVE_OPTION){

f2=jfc2getSelectedFile();

thissetTitle(f2getName());

try{

FileWriter fw = new FileWriter(f2);

BufferedWriter bw = new BufferedWriter(fw);

bwwrite(jtagetText());

bwclose();

fwclose();

}catch(IOException e2){

e2printStackTrace();

}

if(a==2){

}

public void windowClosed(WindowEvent arg0) {

}

public void windowIconified(WindowEvent arg0) {