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Java:Roller程序-调试-无论有效信息如何,都不会从JTextField和NumberFormatException更新变量_Java_Debugging_Variables_Jtextfield_Actionlistener - Fatal编程技术网

Java:Roller程序-调试-无论有效信息如何,都不会从JTextField和NumberFormatException更新变量

Java:Roller程序-调试-无论有效信息如何,都不会从JTextField和NumberFormatException更新变量,java,debugging,variables,jtextfield,actionlistener,Java,Debugging,Variables,Jtextfield,Actionlistener,问题: 我无法获取要更新的JTextFields或rollResultTotal的值。 即使JTextFields中的数据有效,仍然会抛出NumberFormatException 问题:为什么变量不能保持不变?这是由于类本身的声明造成的吗?是否可以更新JLabel面板以显示更新的结果?(尝试过这个,史诗般的失败) 提前感谢您的任何输入和示例 /* ITP-120: Final Project Programmer: S. Schnoor Date: N

问题: 我无法获取要更新的JTextFields或rollResultTotal的值。 即使JTextFields中的数据有效,仍然会抛出NumberFormatException

问题:为什么变量不能保持不变?这是由于类本身的声明造成的吗?是否可以更新JLabel面板以显示更新的结果?(尝试过这个,史诗般的失败)

提前感谢您的任何输入和示例

/*
   ITP-120:     Final Project
   Programmer:  S. Schnoor
   Date:        November 7th, 2009
   Filename:    SchnoorProject.java
   Purpose:     To generate "dice rolls" - a tally of random values as defined by the user,
                including a final calculation modifier.
*/

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.lang.*;
import java.math.*;

public class SchnoorProject extends JFrame implements ActionListener, EventListener
{
    // Declare Class Variables
    int sidesToRoll, diceToRoll, diceLeft, modifier, rollResult, rollResultTotal;
    String getSides, getDice, getModifier;
    JTextField inputSides       = new JTextField();
    JTextField inputDice        = new JTextField();
    JTextField inputModifier    = new JTextField();
    Random roll;

    // Panels and Buttons
    JPanel rollPanel;
    JButton newRollButton, helpButton, exitButton;

    // Create Colors
    Color darkPurple        = new Color ( 80,   0,  80);
    Color darkGold          = new Color (255, 215,   0);
    Color darkCoal          = new Color ( 24,  24,  24);
    Color crimson           = new Color (127,  12,  12);
    Color ltSilver          = new Color (140, 140, 180);

    public static void main(String args[])
    {
        JFrame frame = new SchnoorProject();

        WindowListener l = new WindowAdapter()
            {
                public void windowClosing(WindowEvent e)
                {
                    System.exit(0);
                }
            };

    frame.addWindowListener(l);
    frame.pack();
    frame.setVisible(true);

    }

    public SchnoorProject()
    {
        // Construction of Components
        rollPanel                           = new JPanel();
        getContentPane().add(rollPanel);


        JLabel      sidesLabel              = new JLabel ("Enter the number of sides on each die below.  (1 to 99)");
                    sidesLabel.setForeground(darkGold);
                    sidesLabel.setHorizontalAlignment(sidesLabel.CENTER);

        JTextField  inputSides              = new JTextField("6");
                    inputSides.setBackground(darkCoal);
                    inputSides.setForeground(darkGold);
                    inputSides.setHorizontalAlignment(inputSides.CENTER);

        JLabel      diceLabel               = new JLabel ("Enter the number of dice to roll below.  (1 to 99)");
                    diceLabel.setForeground(darkGold);
                    diceLabel.setHorizontalAlignment(diceLabel.CENTER);

        JTextField  inputDice               = new JTextField("3");
                    inputDice.setBackground(darkCoal);
                    inputDice.setForeground(darkGold);
                    inputDice.setHorizontalAlignment(inputDice.CENTER);

        JLabel      modifierLabel           = new JLabel ("Enter the final modifier  below.  (-99 to 99)");
                    modifierLabel.setForeground(darkGold);
                    modifierLabel.setHorizontalAlignment(modifierLabel.CENTER);

        JTextField  inputModifier           = new JTextField("2");
                    inputModifier.setBackground(darkCoal);
                    inputModifier.setForeground(darkGold);
                    inputModifier.setHorizontalAlignment(inputModifier.CENTER);

        JButton     newRollButton           = new JButton("ROLL");
                    newRollButton.setBackground(darkCoal);
                    newRollButton.setForeground(darkGold);
                    newRollButton.addActionListener(this);

        JButton     helpButton              = new JButton("Help/About");
                    helpButton.setBackground(darkCoal);
                    helpButton.setForeground(ltSilver);
                    helpButton.addActionListener(this);

        JButton     exitButton              = new JButton("Exit");
                    exitButton.setBackground(darkCoal);
                    exitButton.setForeground(crimson);
                    exitButton.addActionListener(this);

        //Conversions
                    getSides                = inputSides.getText();
                    getDice                 = inputDice.getText();
                    getModifier             = inputModifier.getText();
                    sidesToRoll             = Integer.parseInt(getSides);
                    diceToRoll              = Integer.parseInt(getDice);
                    modifier                = Integer.parseInt(getModifier);
                    diceLeft                = diceToRoll;
                    //rollResultTotal       = rollResultTotal;

        // Paneling
        rollPanel.setLayout(new GridLayout (3,3));
        rollPanel.setBackground(darkPurple);
        rollPanel.setForeground(darkGold);
        rollPanel.add(sidesLabel);
        rollPanel.add(diceLabel);
        rollPanel.add(modifierLabel);
        rollPanel.add(inputSides);
        rollPanel.add(inputDice);
        rollPanel.add(inputModifier);
        rollPanel.add(newRollButton);
        rollPanel.add(helpButton);
        rollPanel.add(exitButton);
    }

    // Implement ActionListener for multiple JButtons
    public void actionPerformed(ActionEvent e)
    {
        String arg = e.getActionCommand();
        if ("Help/About".equals(arg))
            {
                JOptionPane.showMessageDialog(null,"This application generates random values, based on the parameters input by the user.\nPlease choose number of dice, sides on each die, and a +/- roll modifier.\nIf no roll modifier is needed, enter 0 (numeric zero) in the modifier field.\n(The starting numbers tell the program to roll 3 six-sided dice and add 2 or '3d6+2'.)","Help/About",JOptionPane.INFORMATION_MESSAGE);
            }

        if ("Exit".equals(arg))
            {
                System.exit(0);
            }

        if ("ROLL".equals(arg))

                {
                    try
                    {
                        while (diceLeft>0)
                        {
                            getSides                    = inputSides.getText();
                            sidesToRoll                 = Integer.parseInt(getSides);
                            if(sidesToRoll<1 || sidesToRoll>99)     throw new NumberFormatException();
                            else

                            getDice                     = inputDice.getText();
                            diceToRoll                  = Integer.parseInt(getDice);
                            if(diceToRoll<1 || diceToRoll>99)       throw new NumberFormatException();
                            else

                            getModifier                 = inputModifier.getText();
                            modifier                    = Integer.parseInt(getModifier);
                            if(modifier<-99 || modifier>99)         throw new NumberFormatException();
                            else

                        rollResult                  = roll.nextInt(sidesToRoll)+1;
                        rollResultTotal             = rollResultTotal + rollResult;
                        diceLeft--;
                        }

                    }


                    catch(NumberFormatException ex)
                    {
                        JOptionPane.showMessageDialog(null,"You must enter an integer within the given range of each field.","ROLL",JOptionPane.INFORMATION_MESSAGE);
                        diceLeft = 0;
                    }


                    {   //Display the Roll Formula and Result
                    JOptionPane.showMessageDialog(null,"You entered a roll of " + (diceToRoll) + "d" + (sidesToRoll) + "+(" + (modifier) + ").\nYou rolled " + (rollResultTotal) + "!");
                    }
        ;}
    ;}
}
/*
ITP-120:最终项目
程序员:S.Schnoor
日期:2009年11月7日
文件名:SchnoorProject.java
目的:生成“骰子卷”-用户定义的随机值计数,
包括最终计算修改器。
*/
导入java.awt.*;
导入java.awt.event.*;
导入java.util.*;
导入javax.swing.*;
导入java.lang.*;
导入java.math.*;
公共类SchnoorProject扩展JFrame实现ActionListener、EventListener
{
//声明类变量
int sidesToRoll,diceToRoll,diceLeft,修饰符,rollResult,rollResultTotal;
字符串getSides、getDice、getModifier;
JTextField inputSides=新的JTextField();
JTextField inputDice=新的JTextField();
JTextField inputModifier=新的JTextField();
随机滚动;
//面板和按钮
JPanel rollPanel;
JButton newroll按钮、helpButton、exitButton;
//创造色彩
颜色暗色调=新颜色(80,0,80);
颜色暗红色=新颜色(255,215,0);
颜色暗色=新颜色(24,24,24);
深红色=新颜色(127,12,12);
颜色ltSilver=新颜色(140、140、180);
公共静态void main(字符串参数[])
{
JFrame=new SchnoorProject();
WindowListener l=新的WindowAdapter()
{
公共无效窗口关闭(WindowEvent e)
{
系统出口(0);
}
};
frame.addWindowListener(l);
frame.pack();
frame.setVisible(true);
}
公共SchnoorProject()
{
//构件的构造
rollPanel=新的JPanel();
getContentPane().add(rollPanel);
JLabel sidesLabel=新JLabel(“在下面的每个模具上输入侧数(1到99)”;
sidesLabel.setForeground(暗金色);
sidesLabel.setHorizontalAlignment(sidesLabel.CENTER);
JTextField inputSides=新的JTextField(“6”);
输入侧立根背景(暗色);
设置前景(暗金色);
inputSides.setHorizontalAlignment(inputSides.CENTER);
JLabel diceLabel=新的JLabel(“在下方输入要滚动的骰子数量(1到99)”;
diceLabel.setForeground(暗金色);
diceLabel.setHorizontalAlignment(diceLabel.CENTER);
JTextField inputDice=新的JTextField(“3”);
输入设置背景(暗色背景);
inputDice.setForeground(暗金色);
inputDice.setHorizontalAlignment(inputDice.CENTER);
JLabel modifierLabel=新的JLabel(“在下面输入最后一个修饰符。(-99到99)”;
修饰符标签设置前景(暗金色);
modifierLabel.setHorizontalAlignment(modifierLabel.CENTER);
JTextField inputModifier=新的JTextField(“2”);
inputModifier.setBackground(暗色背景);
inputModifier.setForeground(暗金色);
inputModifier.setHorizontalAlignment(inputModifier.CENTER);
JButton newRollButton=新JButton(“ROLL”);
newRollButton.setBackground(暗色背景);
newRollButton.setForeground(暗框);
newRollButton.addActionListener(此);
JButton helpButton=新JButton(“帮助/关于”);
helpButton.setBackground(暗色coal);
帮助按钮。设置前景(银色);
helpButton.addActionListener(此);
JButton exitButton=新JButton(“退出”);
出口按钮。退刀台(暗色);
exitButton.设置前景(深红色);
addActionListener(这个);
//转换
getSides=inputSides.getText();
getDice=inputDice.getText();
getModifier=inputModifier.getText();
sidesToRoll=Integer.parseInt(getSides);
diceToRoll=Integer.parseInt(getDice);
修饰符=Integer.parseInt(getModifier);
diceLeft=diceToRoll;
//rollResultTotal=rollResultTotal;
//镶板
rollPanel.setLayout(新的GridLayout(3,3));
辊道板.立根台(暗坡);
rollPanel.setForeground(暗金色);
添加(侧标签);
添加(标签);
添加(修改标签);
rollPanel.add(输入侧);
rollPanel.add(inputDice);
添加(inputModifier);
rollPanel.add(newRollButton);
rollPanel.add(帮助按钮);
添加(退出按钮);
}
//为多个JButton实现ActionListener
已执行的公共无效操作(操作事件e)
{
字符串arg=e.getActionCommand();
if(“Help/About”.equals(arg))
{
JOptionPane.showMessageDialog(null),“此应用程序根据用户输入的参数生成随机值。\n请选择nu。”
JTextField inputSides = new JTextField(" ");
getSides = inputSides.getText();
sidesToRoll = Integer.parseInt(getSides);
JTextField inputSides = new JTextField("6");
arg == "ROLL"
"ROLL".equals(arg)
public class ObjectReferences {
  private final JLabel label = new JLabel("I am FOO"); // label 1

  public ObjectReferences() {
    JLabel label = new JLabel("I am BAR"); // label 2

    JButton button = new JButton("Click me");
    button.addActionListener(new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        onclick();
      }
    });

    // will display "I am BAR"
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(600, 400);
    frame.setLayout(new FlowLayout());
    frame.add(label); // label 2
    frame.add(button);
    frame.setVisible(true);
  }

  public void onclick() {
    // will display "I am FOO"
    JOptionPane.showMessageDialog(null, label.getText()); // label 1
  }

  public static void main(String[] args) {
    new ObjectReferences();
  }
}
public class ObjectReferences {
  private final JLabel label = new JLabel("I am FOO");

  public ObjectReferences() {
    JButton button = new JButton("Click me");
    button.addActionListener(new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        onclick();
      }
    });

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(600, 400);
    frame.setLayout(new FlowLayout());
    frame.add(label);
    frame.add(button);
    frame.setVisible(true);
  }

  public void onclick() {
    JOptionPane.showMessageDialog(null, label.getText());
  }

  public static void main(String[] args) {
    new ObjectReferences();
  }
}