CountTimer kann nicht in einen Typ

Question

aufgelöst werden Ich habe ein Problem, wenn Sie versuchen, den Timer für Minesweeper zu codieren. Grundsätzlich habe ich diesen separaten Timer-Code, und in diesem Code habe ich CountTimer ct außerhalb des Konstruktors deklariert, und es funktioniert gut. Wenn ich jedoch versuche, dasselbe in meinem Minesweeper-Code zu tun, sagt der Compiler, dass CountTimer nicht in einen Typ aufgelöst werden kann. Kann mir bitte jemand helfen?

//////////This is my timer code.////////// 

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 

public class CountTimerGUI2 extends JFrame implements ActionListener { 
    JPanel pan1 = new JPanel(); 

    JLabel timeLabel = new JLabel(); 

    JButton start = new JButton ("Start"); 
    JButton stop = new JButton ("Stop"); 
    CountTimer ct; 

    public CountTimerGUI2() { 
    pan1.setLayout (new BorderLayout()); 
    timeLabel.setBorder (BorderFactory.createRaisedBevelBorder()); 
    pan1.add (timeLabel, BorderLayout.NORTH); 

    start.addActionListener (this); 
    stop.addActionListener (this); 

    JPanel pan2 = new JPanel(); 
    pan2.setLayout (new GridLayout()); 

    pan2.add (start); 
    pan2.add (stop); 

    pan1.add (pan2, BorderLayout.SOUTH); 

    setContentPane (pan1); 
    setVisible (true); 
    pack(); 

    ct = new CountTimer(); 
    } 

    private void setTimerText (String sTime) { 
    timeLabel.setText (sTime); 
    } 

    public void actionPerformed (ActionEvent e) { 
    JButton button = (JButton)e.getSource(); 

    if (button.equals (start)) { 
     ct.start(); 
    } 

    else if (button.equals (stop)) { 
     ct.stop(); 
    } 
    } 

    public static void main (String args []) { 
    java.awt.EventQueue.invokeLater (new Runnable() { 
     public void run() { 
     new CountTimerGUI2(); 
     } 
    }); 
    } 

    private class CountTimer implements ActionListener { 
    private static final int ONE_SECOND = 1000; 
    private int count = 0; 
    private boolean isTimerActive = false; 
    private Timer timer = new Timer (ONE_SECOND, this); 

    public CountTimer() { 
     count = 0; 
     setTimerText (TimeFormat (count)); 
    } 

    public void actionPerformed (ActionEvent e) { 
     if (isTimerActive) { 
     count++; 
     setTimerText (TimeFormat (count)); 
     } 
    } 

    public void start() { 
     count = 0; 
     isTimerActive = true; 
     timer.start(); 
    } 

    public void stop() { 
     timer.stop(); 
    } 
    } 

    private String TimeFormat (int count) { 
    int hours = count/3600; 
    int minutes = (count - hours * 3600)/60; 
    int seconds = count - minutes * 60; 

    return String.format ("%02d", hours) + " : " + String.format ("%02d", minutes) + " : " + String.format ("%02d", seconds); 
    } 
} 

//////////This is my Minesweeper code.////////// 

import java.util.Scanner; 
import java.util.Random; 
//import java.util.*; 
import java.awt.*; 
import java.awt.event.*; 
//import java.io.*; 
//import java.io.FileWriter; 
//import java.io.PrintWriter; 
import javax.swing.*; 
import javax.swing.border.BevelBorder; 
import javax.swing.border.EtchedBorder; 

public class Minesweeper extends JFrame implements ActionListener { 
    public static Scanner myScanner = new Scanner (System.in); 
    public static Random random = new Random(); 

    JPanel pan1 = new JPanel(); 
    JPanel pan2 = new JPanel(); 
    JPanel pan3 = new JPanel(); 
    JPanel pan1_1 = new JPanel(); 
    JPanel pan1_2 = new JPanel(); 
    JPanel pan1_3 = new JPanel(); 
    JPanel pan1_3_D = new JPanel(); 

    JButton button [][]; 
    JButton Save = new JButton ("Save"); 
    JButton Load = new JButton ("Load"); 
    JButton New = new JButton ("New"); 
    JButton One = new JButton ("1"); 
    JButton Two = new JButton ("2"); 
    JButton Three = new JButton ("3"); 
    JButton R = new JButton ("R"); 

    JLabel instruction = new JLabel ("Instruction Panel");//changeable 
    JLabel timeLabel = new JLabel(); 
    JLabel score = new JLabel ("Score");//it is only temporary 

    CountTimer ct; 

    public Minesweeper (int row, int column) { 
    button = new JButton [row][column]; 

    GridLayout gl_pan1 = new GridLayout (1, 3); 
    GridLayout gl_pan2 = new GridLayout (row, column); 
    GridLayout gl = new GridLayout (2, 1);//gl is for the 3 sub-panels in pan1 
    GridLayout gl_pan1_3_D = new GridLayout (1, 4); 

    pan1.setLayout (gl_pan1); 
    pan2.setLayout (gl_pan2); 
    pan1_1.setLayout (gl); 
    pan1_2.setLayout (gl); 
    pan1_3.setLayout (gl); 
    pan1_3_D.setLayout (gl_pan1_3_D); 

    setTitle ("Minesweeper"); 

    JPanel frameBorder = (JPanel)getContentPane(); 
    frameBorder.setLayout (new BoxLayout (getContentPane(), BoxLayout.Y_AXIS)); 
    frameBorder.setBorder (new BevelBorder (BevelBorder.LOWERED)); 

    pan1.setBorder (new EtchedBorder (EtchedBorder.LOWERED)); 
    pan2.setBorder (new EtchedBorder (EtchedBorder.LOWERED)); 
    pan3.setBorder (new EtchedBorder (EtchedBorder.LOWERED)); 

    Save.setMinimumSize (new Dimension (25, 50)); 
    Save.setPreferredSize (new Dimension (25, 50)); 
    Save.setMaximumSize (new Dimension (25, 50)); 
    Load.setMinimumSize (new Dimension (25, 50)); 
    Load.setPreferredSize (new Dimension (25, 50)); 
    Load.setMaximumSize (new Dimension (25, 50)); 
    New.setMinimumSize (new Dimension (25, 50)); 
    New.setPreferredSize (new Dimension (25, 50)); 
    New.setMaximumSize (new Dimension (25, 50)); 

    for (int r = 0; r < row; r++) { 
     for (int c = 0; c < column; c++) { 
     button [r][c] = new JButton(); 
     button [r][c].setMinimumSize (new Dimension (20, 40)); 
     button [r][c].setPreferredSize (new Dimension (20, 40)); 
     button [r][c].setMaximumSize (new Dimension (20, 40)); 
     pan2.add (button [r][c]); 
     //button [r][c].addActionListener (this); 
     } 
    } 

    pan1_1.add (Save); 
    pan1_1.add (Load); 
    pan1_2.add (timeLabel); 
    pan1_2.add (score); 
    pan1_3.add (New); 
    pan1_3_D.add (One); 
    pan1_3_D.add (Two); 
    pan1_3_D.add (Three); 
    pan1_3_D.add (R); 
    pan1_3.add (pan1_3_D); 

    /*Save.addActionListener (this); 
    Load.addActionListener (this); 
    New.addActionListener (this); 
    One.addActionListener (this); 
    Two.addActionListener (this); 
    Three.addActionListener (this); 
    R.addActionListener (this);*/ 

    pan1.add (pan1_1); 
    pan1.add (pan1_2); 
    pan1.add (pan1_3); 
    pan3.add (instruction); 

    frameBorder.add (pan1); 
    frameBorder.add (pan2); 
    frameBorder.add (pan3); 

    setContentPane (frameBorder); 
    pack(); 
    setVisible (true); 
    } 

    public void actionPerformed (ActionEvent event) { 

    } 

    public static void main (String args []) throws Exception { 
    int row = 10; 
    int column = 10; 

    new Minesweeper (row, column); 

    int current_row = 5; 
    int current_col = 5; 
    int percentage = 10; //this is subject to change 
    int number_of_mines = (int)(row*column*percentage*0.01); 
    int mine_position [] = new int [number_of_mines]; 

    boolean revealed [][] = new boolean [row][column]; //whether the button is revealed or not 
    boolean mines [][] = new boolean [row][column]; //whether there is a mine or not 
    int revealed_number [][] = new int [row][column]; //the number that should appear on the revealed button 

    int counter = 0; //this is for the gameEnd method 
    boolean end = false; //whether the game is ended or not 
} 

Answer 1

Der Name der Klasse ist CountTimerGUI2, die auch ist, wie Sie eine Instanz dieses Objekt erstellen müssen, wird:

CountTimerGUI2 ctGUI; 

Dies sollte den Trick.

Beachten Sie auch, dass Sie innerhalb CountTimerGUI2 eine private Klasse CountTimer haben. Wenn Sie versuchen, Zugriff auf das innere Objekt zu erhalten, entfernen Sie die private Klasse Zugriffsmodifikator vor der Deklaration dieser Klasse (das es Paketebene Zugang haben) ...

class CountTimer implements ActionListener { 
    ... 
} 

und dann machen sowohl die CountTimerGUI2 und Minesweeper Klassen in dem gleichen Paket durch Hinzufügen von package package_name; an der Spitze der beiden Dateien.

Dann werden Sie in der Lage sein CountTimerGUI2 ‚s ct Objekt zuzugreifen:

ctGUI.ct.start(); 

Oder eine Instanz dieser inneren Klasse Objekt innerhalb der Klasse Sweeper erstellen:

import package_name.CountTimerGUI2.CountTimer; 
... 
CountTimer ct; 
... 
ct.start();