假设现在咱们就在迷宫的出口，那么你往回走（这个往回走，就是随机产生的，可以任意一个方向），最后到达入口，那么这么一个路线就一定可以走的通 呀。。。
import java.awt.*import javax.swing.*
import java.awt.event.*
import javax.swing.event.*
class JPanelEa1 extends JFrame implements MenuListener,ActionListener
{
JPanel mainp,p1,p2,p3,p4
JTextField jt1
JMenuItem mnuCopy
JMenuItem mnuPaste
JButton bM
boolean isDouble = false// 是否为实数
int opFlag = -1
static double t1 = 0, t2 = 0, t3 = 0, result = 0
static int opflag1 = -1, opflag2 = -1, flag = 0, resflag = 1
int preOp, currentOp = 0// 标准位
double op1 = 0, op2 = 0// 操作数
double n3
StringBuffer buf = new StringBuffer(20)
StringBuffer copyBoard = new StringBuffer(20)// 剪贴板
StringBuffer memory = new StringBuffer(20)// M系列
StringBuffer str = new StringBuffer()
public JPanelEa1()
{
p1=new JPanel()
p1.setLayout(new GridLayout(2,1,10,10))
JMenuBar mnuNotepad=new JMenuBar()
JMenu mnuEdit=new JMenu("编辑(E)")
mnuEdit.setMnemonic(KeyEvent.VK_E)
JMenu mnuCheck=new JMenu("查看(V)")
mnuCheck.setMnemonic(KeyEvent.VK_V)
JMenu mnuHelp=new JMenu("帮助(H)")
mnuCopy=new JMenuItem("复制(C)")
mnuPaste=new JMenuItem("粘贴(P)")
JMenuItem mnuVisit=new JMenuItem("查看帮助(V)")
JMenuItem mnuAbout=new JMenuItem("关于计算器(A)")
JSeparator sep=new JSeparator()
jt1=new JTextField("0.")
jt1.setEnabled(false)
jt1.setHorizontalAlignment(JTextField.RIGHT)
mnuEdit.addMenuListener(this)
mnuCheck.addMenuListener(this)
mnuHelp.addMenuListener(this)
mnuCopy.addActionListener(this)
mnuPaste.addActionListener(this)
mnuVisit.addActionListener(this)
mnuAbout.addActionListener(this)
mnuNotepad.add(mnuEdit)
mnuNotepad.add(mnuCheck)
mnuNotepad.add(mnuHelp)
mnuEdit.add(mnuCopy)
mnuEdit.add(mnuPaste)
mnuEdit.add(sep)
mnuHelp.add(mnuVisit)
mnuHelp.add(sep)
mnuHelp.add(mnuAbout)
p1.add(mnuNotepad)
p1.add(jt1)
p2=new JPanel()
p2.setLayout(new FlowLayout(FlowLayout.CENTER))
bM = new JButton(" ")
bM.setEnabled(false)
p2.add(bM)
Button b25=new Button("Backspace")
b25.addActionListener(this)
Button b26=new Button("CE")
b26.addActionListener(this)
Button b27=new Button("C")
b27.addActionListener(this)
p2.add(b25)
p2.add(b26)
p2.add(b27)
p3=new JPanel()
p3.setLayout(new GridLayout(4,6))
Button button1=new Button("MC")
button1.addActionListener(this)
Button button2=new Button("7")
button2.addActionListener(this)
Button button3=new Button("8")
button3.addActionListener(this)
Button button4=new Button("9")
button4.addActionListener(this)
Button button5=new Button("/")
button5.addActionListener(this)
Button button6=new Button("sqrt")
button6.addActionListener(this)
Button button7=new Button("MR")
button7.addActionListener(this)
Button button8=new Button("4")
button8.addActionListener(this)
Button button9=new Button("5")
button9.addActionListener(this)
Button button10=new Button("6")
button10.addActionListener(this)
Button button11=new Button("*")
button11.addActionListener(this)
Button button12=new Button("%")
button12.addActionListener(this)
Button button13=new Button("MS")
button13.addActionListener(this)
Button button14=new Button("1")
button14.addActionListener(this)
Button button15=new Button("2")
button15.addActionListener(this)
Button button16=new Button("3")
button16.addActionListener(this)
Button button17=new Button("-")
button17.addActionListener(this)
Button button18=new Button("1/x")
button18.addActionListener(this)
Button button19=new Button("M+")
button19.addActionListener(this)
Button button20=new Button("0")
button20.addActionListener(this)
Button button21=new Button("+/-")
button21.addActionListener(this)
Button button22=new Button(".")
button22.addActionListener(this)
Button button23=new Button("+")
button23.addActionListener(this)
Button button24=new Button("=")
button24.addActionListener(this)
p3.add(button1)p3.add(button2)
p3.add(button3)p3.add(button4)
p3.add(button5)p3.add(button6)
p3.add(button7)p3.add(button8)
p3.add(button9)p3.add(button10)
p3.add(button11)p3.add(button12)
p3.add(button13)p3.add(button14)
p3.add(button15)p3.add(button16)
p3.add(button17)p3.add(button18)
p3.add(button19)p3.add(button20)
p3.add(button21)p3.add(button22)
p3.add(button23)p3.add(button24)
setSize(250,150)
mainp=new JPanel()
mainp.setLayout(new GridLayout(3,1))
mainp.add(p1)
mainp.add(p2)
mainp.add(p3)
setContentPane(mainp)
setTitle("计算器")
setSize(300,300)
setVisible(true)
setDefaultCloseOperation(EXIT_ON_CLOSE)
}
public void actionPerformed(ActionEvent e)
{
String s= e.getActionCommand()
if (s.equals("复制(C)")) {
String temp = jt1.getText().trim()
copyBoard.replace(0, copyBoard.length(), temp)
mnuPaste.setEnabled(true)
} else if (s.equals("粘贴(p)")) {
jt1.setText(copyBoard.toString())
} else if (s.equals("CE")) {
jt1.setText("0.")
} else if (s.equals("Backspace")) {
if (!jt1.getText().trim().equals("0.")) {
// 如果文本框中有内容
if (str.length() != 1 &&str.length() != 0) {
jt1.setText(str.delete(str.length() - 1, str.length())
.toString())
} else {
jt1.setText("0.")
str.setLength(0)
}
}
op2 = Double.parseDouble(jt1.getText().trim())
} else if (s.equals("C")) {
// 如果是C删除当前计算
jt1.setText("0.")
op1 = op2 = 0
str.replace(0, str.length(), " ")
preOp = currentOp = 0
} else if (s.equals("MC")) {
// 如果是MC则清除缓冲区
String temp = ""
memory.replace(0, memory.length(), temp)
bM.setText(" ")
} else if (s.equals("MR")) {
// 如果按键为MR则恢复缓冲区的数到文本框
jt1.setText(memory.toString())
} else if (s.equals("MS")) {
// 如果按键为MS则将文本框的数存入缓冲区
String s1 = jt1.getText().trim()
memory.replace(0, memory.length(), s1)
bM.setText("M")
} else if (s.equals("M+")) {
// 如果按键为MS则将文本框值与缓冲区的数相加但不显示结果
String temp1 = jt1.getText().trim()
double dtemp = Double.parseDouble(temp1)
String temp2 = memory.toString()
dtemp += Double.parseDouble(temp2)
temp1 = String.valueOf(dtemp)
memory.replace(0, memory.length(), temp1)
} else if (s.equals("1/x")) {
// 如果按键为1/x则将文本框中的数据为它的倒数
String temp = jt1.getText().trim()
double dtemp = Double.parseDouble(temp)
jt1.setText("" + 1 / dtemp)
} else if (s.equals("sqrt")) {
// 如果按键为sqrt则将文本框中的内容求平方根
String temp = jt1.getText().trim()
double dtemp = Double.parseDouble(temp)
jt1.setText("" + Math.sqrt(dtemp))
} else if (s.equals("+")) {
str.setLength(0)
if (currentOp == 0) {
preOp = currentOp = 1
op2 = 0
jt1.setText("" + op1)
} else {
currentOp = preOp
preOp = 1
switch (currentOp) {
case 1:
op1 += op2
jt1.setText("" + op1)
break
case 2:
op1 -= op2
jt1.setText("" + op1)
break
case 3:
op1 *= op2
jt1.setText("" + op1)
break
case 4:
op1 /= op2
jt1.setText("" + op1)
break
}
}
} else if (s.equals("-")) {
str.setLength(0)
if (currentOp == 0) {
preOp = currentOp = 2// op1=op2op2=0
jt1.setText("" + op1)
} else {
currentOp = preOp
preOp = 2
switch (currentOp) {
case 1:
op1 = op1 + op2
jt1.setText("" + op1)
break
case 2:
op1 = op1 - op2
jt1.setText("" + op1)
break
case 3:
op1 = op1 * op2
jt1.setText("" + op1)
break
case 4:
op1 = op1 / op2
jt1.setText("" + op1)
break
}
}
} else if (s.equals("*"))// *
{
str.setLength(0)
if (currentOp == 0) {
preOp = currentOp = 3// op1=op2op2=1
jt1.setText("" + op1)// op1=op2
} else {
currentOp = preOp
preOp = 3
switch (currentOp) {
case 1:
op1 = op1 + op2
jt1.setText("" + op1)
break
case 2:
op1 = op1 - op2
jt1.setText("" + op1)
break
case 3:
op1 = op1 * op2
jt1.setText("" + op1)
break
case 4:
op1 = op1 / op2
jt1.setText("" + op1)
break
}
}
} else if (s.equals("/"))// /
{
str.setLength(0)
if (currentOp == 0) {
preOp = currentOp = 4// op2=1
jt1.setText("" + op1)// op1=op2
} else {
currentOp = preOp
preOp = 4
switch (currentOp) {
case 1:
op1 = op1 + op2
jt1.setText("" + op1)
break
case 2:
op1 = op1 - op2
jt1.setText("" + op1)
break
case 3:
op1 = op1 * op2
jt1.setText("" + op1)
break
case 4:
op1 = op1 / op2
jt1.setText("" + op1)
break
}
}
} else if (s.equals("="))// =
{
if (currentOp == 0) {
str.setLength(0)
jt1.setText("" + op2)
} else {
str.setLength(0)
currentOp = preOp
switch (currentOp) {
case 1:
op1 = op1 + op2
jt1.setText("" + op1)
break
case 2:
op1 = op1 - op2
jt1.setText("" + op1)
break
case 3:
op1 = op1 * op2
jt1.setText("" + op1)
break
case 4:
op1 = op1 / op2
jt1.setText("" + op1)
break
}
currentOp = 0
op2 = 0
}
} else if (s.equals(".")) {
isDouble = true
if (jt1.getText().trim().indexOf('.') != -1)
else {
if (jt1.getText().trim().equals("0")) {
str.setLength(0)
jt1.setText((str.append("0" + s)).toString())
}
// else
// if(jt1.getText().trim().equals("")){}//如果初时显示为空则不做任何操作
else {
jt1.setText((str.append(s)).toString())
}
}
} else if (s.equals("0"))// 如果选择的是"0"这个数字键
{
if (jt1.getText().trim().equals("0.")) {
} else {
jt1.setText(str.append(s).toString())
op2 = Double.parseDouble(jt1.getText().trim())
}
} else {
jt1.setText(str.append(s).toString())
op2 = Double.parseDouble(jt1.getText().trim())
if (currentOp == 0)
op1 = op2
}
}
public static void main(String args[])
{
JPanelEa1 g=new JPanelEa1()
}
@Override
public void menuSelected(MenuEvent e) {
// TODO Auto-generated method stub
}
@Override
public void menuDeselected(MenuEvent e) {
// TODO Auto-generated method stub
}
@Override
public void menuCanceled(MenuEvent e) {
// TODO Auto-generated method stub
}
}
