public class calculator {
static char operator;
static String operatorWord;
static String nameOfFirstNumber;
static String nameOfSecondNumber;
static double firstNumber;
static double secondNumber;
static int response2;
public static void setResponse2(boolean b){
if(b = true){
response2 = JOptionPane.YES_OPTION;
}
else if(b = false){
response2 = JOptionPane.NO_OPTION;
}
else;
}
public static void setOperator(char c){
operator = c;
}
public static void setOperatorWord(String s) throws NotAnOperatorException{
operatorWord = s;
}
public static String getOperatorWord(char c, int i) throws NotAnOperatorException{
if(c == '*'){
return "Multiplication";
}
else if(c == '/'){
return "Division";
}
else if(c =='+'){
return "Addition";
}
else if(c == '-'){
return "Subtraction";
}
else if(c == '%'){
return "Remainder";
}
if(i < 2){
throw new NotAnOperatorException();
}
return null;
}
public static void defineNameOfNumbers(char c){
if(c == '*'){
nameOfFirstNumber = "multiplicand";
nameOfSecondNumber = "multiplier";
}
else if(c == '/'||c == '%'){
nameOfFirstNumber = "dividend";
nameOfSecondNumber = "divisor";
}
else if(c == '+'){
nameOfFirstNumber = "addend";
nameOfSecondNumber = "addend";
}
else if(c == '-'){
nameOfFirstNumber = "subtrahend";
nameOfSecondNumber = "minuend";
}
}
public static double getRemainder(){
if(operator == '/'||operator == '%'){
return firstNumber%secondNumber;
}
else{
return (Double) null;
}
}
public static double getAnswer(){
if(operator == '*'){
return firstNumber*secondNumber;
}
else if(operator == '/'){
return firstNumber/secondNumber;
}
else if(operator == '%'){
return firstNumber%secondNumber;
}
else if(operator == '+'){
return firstNumber+secondNumber;
}
else if(operator == '-'){
return firstNumber-secondNumber;
}
else{
return (Double) null;
}
}
public static String getRemainderString(){
//get the remainder & string...//
if(operator == '/'){
int answer = (int) (firstNumber/secondNumber);
int remainder = (int) (firstNumber%secondNumber);
return "\n"+answer+" remainder "+remainder;
}
else{
return "";
}
}
/**
* @param args
* @throws NotAnOperatorException
* @throws HeadlessException
*/
public static void main(String[] args) throws HeadlessException, NotAnOperatorException {
//end of catch statements//
do{
//get the operator etc. I know it's a bit overdone.//
try{
char operatorThing = JOptionPane.showInputDialog("Operator:").charAt(0);
setOperator(operatorThing);
setOperatorWord(getOperatorWord(operator, 1));
defineNameOfNumbers(operatorThing);
}
//catch a NotAnOperatorException (defined with NotAnOperatorException.class)//
catch(NotAnOperatorException exc){
Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
exc.printStackTrace(printWriter);
String excSentence = writer.toString();
JOptionPane.showMessageDialog(null,"Something went wrong... Here's the rundown on what happened:\n"+excSentence+"\nWe've figured out what happened, though.\nThat's not an operator...\nRestart to rerun it, it will exit for safety.");
System.exit(0);
}
//catch a null pointer//
catch(NullPointerException exc){
JOptionPane.showMessageDialog(null,"You clicked Cancel. Press OK to quit.");
System.exit(0);
}
//catch an other exception//
catch(Exception exc){
Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
exc.printStackTrace(printWriter);
String excSentence = writer.toString();
JOptionPane.showMessageDialog(null,"Something went wrong... Here's the rundown on what happened:\n"+excSentence+"\nI have no idea what happened.\nRestart to rerun it, it will exit for safety.");
System.exit(0);
}
//get the response with "int response"//
int response;
response = JOptionPane.showConfirmDialog(null, "Would you like to start "+getOperatorWord(operator, 2)+" Calc?");
if(response == JOptionPane.YES_OPTION){
String numberOne = JOptionPane.showInputDialog("X"+operator+"Y=Z\nEnter the "+nameOfFirstNumber+" (the first number.)");
firstNumber = Double.parseDouble(numberOne);
String numberTwo = JOptionPane.showInputDialog(firstNumber+operator+"Y=Z\nEnter the "+nameOfSecondNumber+" (the second number.)");
secondNumber = Double.parseDouble(numberTwo);
if(operator == '/'||operator == '%'){
int response3 =
JOptionPane.showConfirmDialog(null, firstNumber+operator+secondNumber+"="+getAnswer()+getRemainderString()+"\n Would you like to start "+getOperatorWord(operator, 2)+" Calc again?");
if(response3 == JOptionPane.YES_OPTION){
setResponse2(true);
}
else if(response3 == JOptionPane.NO_OPTION||response3 == JOptionPane.CANCEL_OPTION){
setResponse2(false);
System.exit(0);
}
}
else{
int response3 =
JOptionPane.showConfirmDialog(null, firstNumber+operator+secondNumber+"="+getAnswer()+"\n Would you like to start "+getOperatorWord(operator, 2)+" Calc again?");
if(response3 == JOptionPane.YES_OPTION){
setResponse2(true);
}
else if(response3 == JOptionPane.NO_OPTION||response3 == JOptionPane.CANCEL_OPTION){
setResponse2(false);
System.exit(0);
}
}
}
}
while(response2 == JOptionPane.YES_OPTION);
}
}
好的，我知道这是一大堆代码。抱歉，但是...当对话框显示时"X"+operator+"Y=Z\nEnter the "+nameOfFirstNumber+" (the first number.)"，如果我输入 1（在下一个对话框中），它会说"48.0Y=Z"（如果它处于除法模式。）它甚至不显示操作员，我也没有输入 48，我输入了 1。在其他模式下，它显示从 40 到 50 的某个数字。这是怎么回事？这很奇怪……
谢谢！
[编辑]好的，它与 ASCII 有关。但是我该如何解决呢？
[编辑]为什么它不显示操作员？