從主到類傳遞參數和stdin

Question

有人能給我一個例子，基於我有什麼，關於如何將命令行args或stdin從main傳遞給名爲drawOnGrid的類？我很難理解它。基本上我需要使用「g.drawString（argOne，10，10）;」而不是drawOval或drawLine。我附上我的代碼。

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

public class Tictactoe extends JFrame { 

//construct a figurePanel 
public Tictactoe() { 

    Container RandomTicTacToePanel = getContentPane(); 
    RandomTicTacToePanel.setLayout(new GridLayout(3, 3)); 


    for (int i = 0; i < 9; i++) { 
     RandomTicTacToePanel.add(new drawOnGrid()); 
    } 
} 

//Main method 
public static void main(String[] args) { 

    String argOne; 
    String argTwo; 

    Scanner in = new Scanner(System.in); 

    int length = args.length; 
    if (length <= 0) { 
     System.out.println("Please enter player One's symbol: "); 
     argOne = in.nextLine(); 
     System.out.println("Please enter player Two's symbol: "); 
     argTwo = in.nextLine(); 
     in.close(); 
    } 

    Tictactoe Tframe = new Tictactoe(); 
    Tframe.setTitle("Tic Tac Toe Panel: Random Entries"); 
    Tframe.setSize(350, 350); 
    Tframe.setResizable(true); 
    Tframe.setLocationRelativeTo(null); 
    Tframe.setVisible(true); 
    Tframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
} 

class drawOnGrid extends JPanel { 

    //overide the paintComponent 
    @Override 
    protected void paintComponent(Graphics g) { 
     super.paintComponent(g); 

     int random = (int) (Math.random() * 3); 

     for (int i = 0; i < 3; i++) { 
      for (int j = 0; j < 3; j++) { 

       if (random == 0) { 
        System.out.print(" "); 
       } else if (random == 1) { 
        g.drawOval(10, 10, getWidth() - 20, getHeight() - 20); 
       } else if (random == 2) { 
        g.drawLine(10, 10, getWidth() - 10, getHeight() - 10); 
        g.drawLine(getWidth() - 10, 10, 10, getHeight() - 10); 

       } 
      } 

     } 
    } 
} 
} 

我真的很感激它。謝謝。

Answer 1

試試這個：

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

public class Tictactoe extends JFrame { 

//construct a figurePanel 
public Tictactoe(String text) { 

    Container RandomTicTacToePanel = getContentPane(); 
    RandomTicTacToePanel.setLayout(new GridLayout(3, 3)); 


    for (int i = 0; i < 9; i++) { 
     RandomTicTacToePanel.add(new drawOnGrid(text)); 
    } 
} 

//Main method 
public static void main(String[] args) { 

    String argOne = null; // Init with null 
    String argTwo = null; // Init with null 

    Scanner in = new Scanner(System.in); 

    int length = args.length; 
    if (length <= 0) { 
     System.out.println("Please enter player One's symbol: "); 
     argOne = in.nextLine(); 
     System.out.println("Please enter player Two's symbol: "); 
     argTwo = in.nextLine(); 
     in.close(); 
    } else if(length == 1) { 
     argOne = args[0]; 
    } else if(length == 2) { 
     argOne = args[0]; 
     argTwo = args[1]; 
    } 

    Tictactoe Tframe = new Tictactoe(argOne); 
    Tframe.setTitle("Tic Tac Toe Panel: Random Entries"); 
    Tframe.setSize(350, 350); 
    Tframe.setResizable(true); 
    Tframe.setLocationRelativeTo(null); 
    Tframe.setVisible(true); 
    Tframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
} 

class drawOnGrid extends JPanel { 

    private String text; 

    public drawOnGrid(String text) { 
     this.text = text; 
    } 

    //overide the paintComponent 
    @Override 
    protected void paintComponent(Graphics g) { 
     super.paintComponent(g); 

     int random = (int) (Math.random() * 3); 

     for (int i = 0; i < 3; i++) { 
      for (int j = 0; j < 3; j++) { 

       if (random == 0) { 
        System.out.print(" "); 
       } else if (random == 1) { 
        g.drawOval(10, 10, getWidth() - 20, getHeight() - 20); 
       } else if (random == 2) { 
        g.drawLine(10, 10, getWidth() - 10, getHeight() - 10); 
        g.drawLine(getWidth() - 10, 10, 10, getHeight() - 10); 

       } 
      } 

     } 
    } 
}