在我的一个类中，所有后端“计算”我的while循环似乎只运行一次。我的代码似乎都工作，我甚至得到一个输出，但只有在while循环只运行一次。该类的所有输入都来自另一个类，输出打印在输入来自的同一个类中。任何额外的帮助也将不胜感激。
calculating class code:
package clock;
public class basic {
static displayFrame outputs = new displayFrame();
public static String output;
public static String findDate(int year, int month, int day, int hour, int timeToAdd){
double yearD = year;
double leapYear = yearD/4;
int daysInMonth = 0;
int daysInYear = 365;
int casePick = 0;
int x = 0;
//Making sure that the number added isn't negative, ones for other inputs MAY come...
while(x == 0)
{
if(Math.abs(timeToAdd) != timeToAdd){
continue;
}else{
x++;
}
System.out.println(year);
System.out.println(month);
System.out.println(day);
System.out.println(hour);
System.out.println(timeToAdd);
/*Starts the counting loop and for each month value, it will determine how many days are in it
this will allow for exact measurement.*/
while(timeToAdd != 0){
System.out.println(timeToAdd);
switch(month)
{
case 1:
daysInMonth = 31;
break;
case 2:
if(leapYear % 1 == 0){
daysInYear = 366;
daysInMonth = 29;
}else{
daysInMonth = 28;
}
break;
case 3:
daysInMonth = 31;
break;
case 4:
daysInMonth = 30;
break;
case 5:
daysInMonth = 31;
break;
case 6:
daysInMonth = 30;
break;
case 7:
daysInMonth = 31;
break;
case 8:
daysInMonth = 31;
break;
case 9:
daysInMonth = 30;
break;
case 10:
daysInMonth = 31;
break;
case 11:
daysInMonth = 30;
break;
case 12:
daysInMonth = 31;
break;
}
/*Decides whether a year, month, day or hour is left, adds one to its counter,
and then takes away that amount of time from the hours added that are left*/
if(timeToAdd >= daysInYear * 24){
timeToAdd = timeToAdd - (daysInYear * 24);
year++;
break;
}
if(timeToAdd >= daysInMonth * 24 && timeToAdd < daysInYear * 24){
timeToAdd = timeToAdd - (daysInMonth * 24);
month++;
break;
}
if(timeToAdd >= 24 && timeToAdd < daysInMonth * 24){
timeToAdd = timeToAdd - 24;
day++;
break;
}
if(timeToAdd >= 1 && timeToAdd < 24){
timeToAdd = timeToAdd - 1;
hour++;
break;
}
//Makes sure there are never 25 hours, 32 days or 13 months
if(hour > 24){
day++;
hour = 1;
}
if(day > daysInMonth){
month++;
day = 1;
}
if(month > 12){
year++;
month = 1;
System.out.println("The date you have requested is: " + month + "/" + day + "/" + year + " Hour:" + hour);
}
}
output = "The date you have requested is: " + month + "/" + day + "/" + year + " Hour:" + hour;
}
System.out.println(timeToAdd);
return output;
}
}
JFrame类代码：
package clock;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class displayFrame extends JPanel{
private static final long serialVersionUID = 1L;
static basic out = new basic();
public static int hrsIn;
public static int daysIn;
public static int monthsIn;
public static int yearsIn;
public static int timeAdd;
public static JButton enter;
public static JLabel dayLabel, hourLabel, monthLabel, yearLabel, timeAdded1, newTime;
public static JTextField dayField, hourField, monthField, yearField, timeAdded;
public static JFrame frame;
public static JPanel newTimePanel;
public static String output = basic.findDate(yearsIn, monthsIn, daysIn, hrsIn, timeAdd);
public displayFrame()
{
super(new BorderLayout());
enter = new JButton("Okay");
dayField = new JTextField(20);
hourField = new JTextField(20);
monthField = new JTextField(20);
yearField = new JTextField(20);
timeAdded = new JTextField(20);
hourLabel = new JLabel("Hour: ", JLabel.CENTER);
dayLabel = new JLabel("Day: ", JLabel.CENTER);
monthLabel = new JLabel("Month: ", JLabel.CENTER);
yearLabel = new JLabel("Year: ", JLabel.CENTER);
timeAdded1 = new JLabel("Added: ", JLabel.CENTER);
newTime = new JLabel(output, JLabel.CENTER);
JPanel button = new JPanel(new GridLayout(0,1));
button.add(enter);
JPanel fieldPane = new JPanel(new GridLayout(0,1));
fieldPane.add(hourField);
fieldPane.add(dayField);
fieldPane.add(monthField);
fieldPane.add(yearField);
fieldPane.add(timeAdded);
JPanel newTimePanel = new JPanel(new FlowLayout());
newTimePanel.add(newTime);
JPanel labels = new JPanel(new GridLayout(0,1));
labels.add(hourLabel);
labels.add(dayLabel);
labels.add(monthLabel);
labels.add(yearLabel);
labels.add(timeAdded1);
setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
add(fieldPane, BorderLayout.LINE_END);
add(labels, BorderLayout.CENTER);
add(button, BorderLayout.PAGE_END);
}
private static void createAndShowGUI()
{
frame = new JFrame("Clock Adder");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400, 300);
frame.add(new displayFrame());
frame.pack();
frame.setVisible(true);
enter.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
hrsIn = Integer.parseInt(hourField.getText());
daysIn = Integer.parseInt(dayField.getText());
monthsIn = Integer.parseInt(monthField.getText());
yearsIn = Integer.parseInt(yearField.getText());
timeAdd = Integer.parseInt(timeAdded.getText());
String result = basic.findDate(yearsIn, monthsIn, daysIn, hrsIn, timeAdd);
JOptionPane.showMessageDialog(frame, result);
}
});
}
public static void main(String[] args) {
System.out.println(output);
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run(){
createAndShowGUI();
}
}
);
}
}
非常感谢任何帮助，谢谢！
答案 0 :(得分：2)
每当您在break语句之外调用switch时，它都会立即退出您的while循环。
如果您想要转到循环的开头，请改用continue。