Java实验代码.docx
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Java实验代码.docx
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Java实验代码
1、写一程序,其功能是:
实现二个按钮,其中一个铵钮名是:
"Pressme"另一按钮名是"Don'tPressme";
publicclassmeextendsFrame{
Framef=newFrame();
publicstaticvoidmain(String[]args){
mem=newme();
Buttonb1=newButton("Pressme");
Buttonb2=newButton("Don'tPressme");
m.f.add(b1);
m.f.add(b2);
m.f.show();
m.f.setSize(200,100);
m.setLayout(newFlowLayout());
m.f.setVisible(true);
m.f.addWindowListener(newMyWindowAction());
}
}
2、写一程序,其功能是:
实现文件对话框的操作;
importjava.awt.*;
publicclassMyDialog{
publicstaticvoidmain(String[]args){
Framef=newFrame("TestMyDialog!
");
FileDialogfd=newFileDialog(f,"请选择要打开的文件!
",FileDialog.LOAD);
fd.show();
}
}
3、写一程序,其功能是:
进行计算器的基本操作,实现加,减,乘,除操作即可;
packagea1;
importjava.awt.*;
importjava.awt.event.*;
classcal{
publicstaticvoidmain(String[]args){
CalFramef=newCalFrame();
}
}
classCalFrameextendsFrame{
doubled1,d2;
intop=-1;
TextFieldtf;
CalPanelLp1;
CalPanelRp2;
//Constructor
CalFrame(){
super("SmallCalculator");
setLayout(newFlowLayout(FlowLayout.CENTER,8,10));
setBackground(newColor(100,150,150));
setForeground(Color.white);
setResizable(false);
setSize(300,200);
tf=newTextField(22);
tf.setEditable(false);
tf.setBackground(newColor(108,118,103));
tf.setForeground(Color.white);
tf.setFont(newFont("Arial",Font.BOLD,16));
add(tf);
p1=newCalPanelL();
p2=newCalPanelR();
add(p1);
add(p2);
setVisible(true);
addWindowListener(newWclose());
}
//innerclass:
CalButton
classCalButtonextendsButton{
CalButton(Strings){
super(s);
setBackground(Color.gray);
}
}
//innerclass:
CalPanelL
classCalPanelLextendsPanel{
CalButtonb0,b1,b2,b3,
b4,b5,b6,b7,
b8,b9,bPN,bPoint;
CalPanelL(){
setLayout(newGridLayout(4,3));
setFont(newFont("TimesRoman",Font.BOLD,16));
b0=newCalButton("0");
b1=newCalButton("1");
b2=newCalButton("2");
b3=newCalButton("3");
b4=newCalButton("4");
b5=newCalButton("5");
b6=newCalButton("6");
b7=newCalButton("7");
b8=newCalButton("8");
b9=newCalButton("9");
bPN=newCalButton("+/-");
bPoint=newCalButton(".");
//加入按钮
add(b7);b7.addActionListener(newPressB7());
add(b8);b8.addActionListener(newPressB8());
add(b9);b9.addActionListener(newPressB9());
add(b4);b4.addActionListener(newPressB4());
add(b5);b5.addActionListener(newPressB5());
add(b6);b6.addActionListener(newPressB6());
add(b1);b1.addActionListener(newPressB1());
add(b2);b2.addActionListener(newPressB2());
add(b3);b3.addActionListener(newPressB3());
add(b0);b0.addActionListener(newPressB0());
add(bPN);bPN.addActionListener(newPressBPN());;
add(bPoint);bPoint.addActionListener(newPressBPoint());
}
}
classCalPanelRextendsPanel{
CalButtonbAdd,bSub,bMul,bDiv,
bSqrt,bSin,bCos,bYx,
bLn,bEqual,bCE,bBack;
CalPanelR(){
setLayout(newGridLayout(4,3));
setFont(newFont("TimesRoman",Font.BOLD,16));
bAdd=newCalButton("+");
bSub=newCalButton("-");
bMul=newCalButton("*");
bDiv=newCalButton("/");
bSqrt=newCalButton("sqrt");
bSin=newCalButton("sin");
bCos=newCalButton("cos");
bYx=newCalButton("y^x");
bLn=newCalButton("ln");
bEqual=newCalButton("=");
bCE=newCalButton("CE");
bBack=newCalButton("<-");
add(bDiv);bDiv.addActionListener(newPressBDiv());
add(bSqrt);bSqrt.addActionListener(newPressBSqrt());
add(bLn);bLn.addActionListener(newPressBLn());
add(bMul);bMul.addActionListener(newPressBMul());
add(bSin);bSin.addActionListener(newPressBSin());
add(bBack);bBack.addActionListener(newPressBBack());
add(bSub);bSub.addActionListener(newPressBSub());
add(bCos);bCos.addActionListener(newPressBCos());
add(bCE);bCE.addActionListener(newPressBCE());
add(bAdd);bAdd.addActionListener(newPressBAdd());
add(bYx);bYx.addActionListener(newPressBYx());
add(bEqual);bEqual.addActionListener(newPressBEqual());
}
}
classPressBAddimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
d1=Double.parseDouble(tf.getText());
op=0;
tf.setText("");
}catch(Exceptionee){}
}
}
classPressBSubimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
d1=Double.parseDouble(tf.getText());
op=1;
tf.setText("");
}catch(Exceptionee){}
}
}
classPressBMulimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
d1=Double.parseDouble(tf.getText());
op=2;
tf.setText("");
}catch(Exceptionee){}
}
}
classPressBDivimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
d1=Double.parseDouble(tf.getText());
op=3;
tf.setText("");
}catch(Exceptionee){}
}
}
classPressBYximplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
d1=Double.parseDouble(tf.getText());
op=4;
tf.setText("");
}catch(Exceptionee){}
}
}
classPressBEqualimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
doubleresult=0;
d2=Double.parseDouble(tf.getText());
switch(op){
case0:
result=d1+d2;
break;
case1:
result=d1-d2;
break;
case2:
result=d1*d2;
break;
case3:
result=d1/d2;
break;
case4:
result=Math.pow(d1,d2);
break;
default:
}
tf.setText(String.valueOf(result));
}catch(Exceptionee){}
}
}
classPressBSqrtimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
doublex=Double.parseDouble(tf.getText());
doubley;
y=Math.sqrt(x);
tf.setText(y+"");
}catch(Exceptionee){}
}
}
classPressBLnimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
doublex=Double.parseDouble(tf.getText());
doubley;
y=Math.log(x);
tf.setText(y+"");
}catch(Exceptionee){}
}
}
classPressBSinimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
doublex=Double.parseDouble(tf.getText());
doubley;
y=Math.sin(x);
tf.setText(y+"");
}catch(Exceptionee){}
}
}
classPressBCosimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
doublex=Double.parseDouble(tf.getText());
doubley;
y=Math.cos(x);
tf.setText(y+"");
}catch(Exceptionee){}
}
}
classPressBBackimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
Stringtext=tf.getText();
text=text.substring(0,text.length()-1);
tf.setText(text);
}catch(Exceptionee){}
}
}
classPressBCEimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
tf.setText("");
}
}
classPressBPNimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
try{
Stringtext=tf.getText();
if(text!
=""){
if(text.charAt(0)=='-')
tf.setText(text.substring
(1));
elseif(text.charAt(0)>='0'&&text.charAt(0)<='9')
tf.setText("-"+text.substring(0));
elseif(text.charAt(0)=='.')
tf.setText("-0"+text.substring(0));
}
}catch(Exceptionee){}
}
}
classPressBPointimplementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
if(text.lastIndexOf(".")==-1)
tf.setText(text+".");
}
}
classPressB0implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"0");
}
}
classPressB1implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"1");
}
}
classPressB2implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"2");
}
}
classPressB3implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"3");
}
}
classPressB4implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"4");
}
}
classPressB5implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"5");
}
}
classPressB6implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"6");
}
}
classPressB7implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"7");
}
}
classPressB8implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"8");
}
}
classPressB9implementsActionListener{
publicvoidactionPerformed(ActionEvente){
Stringtext=tf.getText();
tf.setText(text+"9");
}
}
//class:
Wclose
classWcloseextendsWindowAdapter{
publicvoidwindowClosing(WindowEvente){
System.exit(0);
}
}
}
4、
importjavax.swing.*;
publicclassMyLabel{
JFramejf;
JPaneljp;
publicstaticvoidmain(String[]args){
JLabeljl=newJLabel("ÄúºÃ£¡");
MyLabelml=newMyLabel();
JButtonjb=newJButton();
jb.add(jl);
ml.jp.add(jb);
ml.jf.setVisible(true);
}
publicMyLabel(){
jf=newJFrame("²âÊÔLabel×é¼þµÄʹÓã¡");
jp=newJPanel();
jp.setLayout(null);
jf.getContentPane().add(jp);
}
}
5、
importjava.awt.*;
importjava.awt.event.*;
publicclassMyWindow{
Framef=newFrame();
publicstaticvoidmain(String[]args){
MyWindowmw=newMyWindow();
//向事件源对象f注册一个事件监听类对象
mw.f.addWindowListener(newMyWindowAction());
mw.f.setSize(200,100);
mw.f.show();
}
}
//事件监听类实现WindowListener
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