床单格子 -
图给你了，代码在下面，看你就是学生。估计没好好学，代码给你了估计也跑不起来，找你班上学霸帮忙看看，应该就没问题了
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Calc extends JFrame {
private String oprecord="";//record the all operate contains number button and operate button
public void recordOp(String str){
oprecord+=str;
}
private class Listener implements ActionListener{
public void judgeInit(){
if(oprecord.length()>3){
String str=oprecord.substring(oprecord.length()-2,oprecord.length()-1);
if(str.equals("=")){
tmpval="";
}
}
}
public void actionPerformed(ActionEvent e) {
if(e.getSource()==btn1){
recordOp("1");judgeInit();
val+="1";
txt.setText(val);
}
if(e.getSource()==btn2){
recordOp("2");judgeInit();
val+="2";
txt.setText(val);
}
if(e.getSource()==btn3){
recordOp("3");judgeInit();
val+="3";
txt.setText(val);
}
if(e.getSource()==btn4){
recordOp("4");judgeInit();
val+="4";
txt.setText(val);
}
if(e.getSource()==btn5){
recordOp("5");judgeInit();
val+="5";
txt.setText(val);
}
if(e.getSource()==btn6){
recordOp("6");judgeInit();
val+="6";
txt.setText(val);
}
if(e.getSource()==btn7){
recordOp("7");judgeInit();
val+="7";
txt.setText(val);
}
if(e.getSource()==btn8){
recordOp("8");judgeInit();
val+="8";
txt.setText(val);
}
if(e.getSource()==btn9){
recordOp("9");judgeInit();
val+="9";
txt.setText(val);
}
if(e.getSource()==btn0){
if(val!="0"){
recordOp("0");
val+="0";
txt.setText(val);
}
}
if(e.getSource()==btnDot){
if(val!=""&&!val.contains(".")){
recordOp(".");
val+=".";
txt.setText(val);
}
}
if(e.getSource()==btnAdd){
op("+");
}
if(e.getSource()==btnCut){
op("-");
}
if(e.getSource()==btnMulti){
op("*");
}
if(e.getSource()==btnDiv){
op("/");
}
if(e.getSource()==btnRemdr){
op("%");
}
if(e.getSource()==btnC){
c();
}
if(e.getSource()==btnCE){
ce();
}
if(e.getSource()==btnEq){
eq();
}
if(e.getSource()==btnBsp){
backspace();
}
}
}
/**
* backspace button
*/
public void backspace(){
if(val!=""){
if(val.length()==1){//if val"s length equals 1
val="";
}else{//if not
val=val.substring(0,val.length()-1);
}
txt.setText(val);
}
}
/**
* clean all variable
*/
public void c(){
val="";
tmpval="";
lastop="";
txt.setText("");//show empty
}
/**
* click the CE button
*/
public void ce(){
if(val!=""){//if last input value not empty
val="";//clean the last input value
txt.setText("");//clean JTextField
}
}
/**
* click the equals button
*/
public void eq(){
recordOp("=");
if(val.length()>0&&tmpval.length()>0){
if(lastop.equals("+")){
tmpval=String.valueOf(Double.valueOf(tmpval)+Double.valueOf(val));//calculate and set value to tmpval
}else if(lastop.equals("-")){
tmpval=String.valueOf(Double.valueOf(tmpval)-Double.valueOf(val));
}else if(lastop.equals("*")){
tmpval=String.valueOf(Double.valueOf(tmpval)*Double.valueOf(val));
}else if(lastop.equals("/")){
tmpval=String.valueOf(Double.valueOf(tmpval)/Double.valueOf(val));
}else if(lastop.equals("%")){
tmpval=String.valueOf(Double.valueOf(tmpval)%Double.valueOf(val));
}
txt.setText(tmpval);//show in JTextField
val="";//empty the val
}
}
/**
* click the +,-,*,/,% button
* @param opstr String clicked operate button"s Text
*/
public void op(String opstr){
recordOp(opstr);
lastop=opstr;//record the last operate
if(val.length()>0){//if input some numbers before
if(tmpval.length()<1){//if tmpval is empty
tmpval=val;//set val"s value to tmpval
}else{
if(opstr.equals("+")){//judge operate
tmpval=String.valueOf(Double.valueOf(tmpval)+Double.valueOf(val));
}else if(opstr.equals("-")){
tmpval=String.valueOf(Double.valueOf(tmpval)-Double.valueOf(val));
}else if(opstr.equals("*")){
tmpval=String.valueOf(Double.valueOf(tmpval)*Double.valueOf(val));
}else if(opstr.equals("/")){
tmpval=String.valueOf(Double.valueOf(tmpval)/Double.valueOf(val));
}else if(opstr.equals("%")){
tmpval=String.valueOf(Double.valueOf(tmpval)%Double.valueOf(val));
}
txt.setText(tmpval);//show in JTextField
}
val="";//empty the val
}
}
private static final long serialVersionUID = 2555984474884316451L;
private JFrame frm;
private JTextField txt;
private JButton btn1;
private JButton btn2;
private JButton btn3;
private JButton btn4;
private JButton btn5;
private JButton btn6;
private JButton btn7;
private JButton btn8;
private JButton btn9;
private JButton btn0;
private JButton btnDot;
private JButton btnAdd;
private JButton btnCut;
private JButton btnMulti;
private JButton btnDiv;
private JButton btnEq;
private JButton btnBsp;//cancel the last input character. exp:val=val.subString(0,str.length()-1)
private JButton btnC;//clear val and tmpval value
private JButton btnCE;//clear last input value
private JButton btnRemdr;//take the remainder
private String val="";//now input value
private String tmpval="";//temporary value
private String lastop="";//last clicked operate
private int btnWidth=49;//button"s width
private int btnHeight=26;//button"s height
public Calc(){
frm=new JFrame();
frm.getContentPane().setLayout(null);//set layout for JTextField(Must)
frm.setBounds(400, 300, 245, 235);//set x,y,width,height for JTextField
frm.setTitle("Calculate");//set From title text
frm.setDefaultCloseOperation(EXIT_ON_CLOSE);
frm.setResizable(false);
txt=new JTextField();
txt.setBounds(3, 5, 232, 28);//set x,y,width,height for JTextField
txt.setBackground(Color.WHITE);//set background color for JTextField
txt.setFont(new Font("",Font.PLAIN,19));//set font for JTextField
txt.setEditable(false);
//new JButton and add listener
btn1=new JButton("1");btn1.addActionListener(new Listener());
btn2=new JButton("2");btn2.addActionListener(new Listener());
btn3=new JButton("3");btn3.addActionListener(new Listener());
btn4=new JButton("4");btn4.addActionListener(new Listener());
btn5=new JButton("5");btn5.addActionListener(new Listener());
btn6=new JButton("6");btn6.addActionListener(new Listener());
btn7=new JButton("7");btn7.addActionListener(new Listener());
btn8=new JButton("8");btn8.addActionListener(new Listener());
btn9=new JButton("9");btn9.addActionListener(new Listener());
btn0=new JButton("0");btn0.addActionListener(new Listener());
btnDot=new JButton(".");btnDot.addActionListener(new Listener());btnDot.setToolTipText("小数点");
btnAdd=new JButton("+");btnAdd.addActionListener(new Listener());
btnCut=new JButton("-");btnCut.addActionListener(new Listener());
btnMulti=new JButton("*");btnMulti.addActionListener(new Listener());
btnDiv=new JButton("/");btnDiv.addActionListener(new Listener());
btnEq=new JButton("=");btnEq.addActionListener(new Listener());
btnC=new JButton("C");btnC.addActionListener(new Listener());btnC.setToolTipText("清空并重新开始计算");
btnCE=new JButton("CE");btnCE.addActionListener(new Listener());btnCE.setToolTipText("清除当前数字");
btnBsp=new JButton("<-");btnBsp.addActionListener(new Listener());btnBsp.setToolTipText("清除刚才输入的数字");
btnRemdr=new JButton("%");btnRemdr.addActionListener(new Listener());btnRemdr.setToolTipText("取余数");
//set JButton x,y,width,height
btnBsp.setBounds(5, 40, btnWidth, btnHeight);
btnCE.setBounds(65, 40, btnWidth, btnHeight);
btnC.setBounds(125, 40, btnWidth, btnHeight);
btnRemdr.setBounds(185, 40, btnWidth, btnHeight);
btn1.setBounds(5, 70, btnWidth, btnHeight);
btn2.setBounds(65, 70, btnWidth, btnHeight);
btn3.setBounds(125, 70, btnWidth, btnHeight);
btnAdd.setBounds(185, 70, btnWidth, btnHeight);
btn4.setBounds(5, 100, btnWidth, btnHeight);
btn5.setBounds(65, 100, btnWidth, btnHeight);
btn6.setBounds(125, 100, btnWidth, btnHeight);
btnCut.setBounds(185, 100, btnWidth, btnHeight);
btn7.setBounds(5, 130, btnWidth, btnHeight);
btn8.setBounds(65, 130, btnWidth, btnHeight);
btn9.setBounds(125, 130, btnWidth, btnHeight);
btnDiv.setBounds(185, 130, btnWidth, btnHeight);
btnMulti.setBounds(5, 160, btnWidth, btnHeight);
btn0.setBounds(65, 160, btnWidth, btnHeight);
btnDot.setBounds(125, 160, btnWidth, btnHeight);
btnEq.setBounds(185, 160, btnWidth, btnHeight);
//add Companet to JFrame
frm.add(txt);
frm.add(btn1);
frm.add(btn2);
frm.add(btn3);
frm.add(btn4);
frm.add(btn5);
frm.add(btn6);
frm.add(btn7);
frm.add(btn8);
frm.add(btn9);
frm.add(btn0);
frm.add(btnDot);
frm.add(btnAdd);
frm.add(btnCut);
frm.add(btnMulti);
frm.add(btnDiv);
frm.add(btnEq);
frm.add(btnC);
frm.add(btnCE);
frm.add(btnBsp);
frm.add(btnRemdr);
//show JFrame
frm.setVisible(true);
}
public static void main(String[] args) {
@SuppressWarnings("unused")
Calc ta=new Calc();
}
}