如何使用ActionListener setText jextfields的2D数组?

发布于 2025-01-29 13:25:39 字数 4396 浏览 3 评论 0原文

我的任务是创建2个JPanels,一个用于2D数组,6行5个空的JTEXTFIELDS,另一个用于JButtons,它们应该类似于屏幕上的键盘。我用空的jtextfields和jbuttons创建了jpanels,现在我需要一种方法,以便当我用字母的字母按jbutton时,它将将该信分配给第一个可用行的第一个可用的jtextfield,然后移动一列时间直到整个行都充满字母(尝试将字母添加到完整行中应该什么都不做)。我还需要创建一个backspace按钮,该按钮将删除最后一个字母(在空行上按下反戳记应该什么也不做)。

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

public class Wordle extends JFrame implements ActionListener 
{
    private JPanel p1;
    private JPanel p2;
    private JTextField [][] g;

    public Wordle()
    {
        setSize(500,300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        p1 = new JPanel();
        p1.setLayout(new GridLayout(6, 5));
        g=new JTextField [5][6];
        for(int r=0; r<g.length; r++)
        {
            for(int c=0; c<g[r].length; c++)
            {
                g[r][c]= new JTextField();
                getContentPane().add(g[r][c]);
                p1.add(g[r][c]);
            }
        }

        
        p2 = new JPanel();
        p2.setLayout(new GridLayout(4, 7));
        JButton a= new JButton("A");
        a.addActionListener(this);
        p2.add(a);
        JButton b= new JButton("B");
        b.addActionListener(this);
        p2.add(b);
        JButton c= new JButton("C");
        c.addActionListener(this);
        p2.add(c);
        JButton d= new JButton("D");
        d.addActionListener(this);
        p2.add(d);
        JButton e= new JButton("E");
        e.addActionListener(this);
        p2.add(e);
        JButton f= new JButton("F");
        f.addActionListener(this);
        p2.add(f);
        JButton g= new JButton("G");
        g.addActionListener(this);
        p2.add(g);
        JButton h= new JButton("H");
        h.addActionListener(this);
        p2.add(h);
        JButton i= new JButton("I");
        i.addActionListener(this);
        p2.add(i);
        JButton j= new JButton("J");
        j.addActionListener(this);
        p2.add(j);
        JButton k= new JButton("K");
        k.addActionListener(this);
        p2.add(k);
        JButton l= new JButton("L");
        l.addActionListener(this);
        p2.add(l);
        JButton m= new JButton("M");
        m.addActionListener(this);
        p2.add(m);
        JButton n= new JButton("N");
        n.addActionListener(this);
        p2.add(n);
        JButton o= new JButton("O");
        o.addActionListener(this);
        p2.add(o);
        JButton p= new JButton("P");
        p.addActionListener(this);
        p2.add(p);
        JButton q= new JButton("Q");
        q.addActionListener(this);
        p2.add(q);
        JButton r= new JButton("R");
        r.addActionListener(this);
        p2.add(r);
        JButton s= new JButton("S");
        s.addActionListener(this);
        p2.add(s);
        JButton t= new JButton("T");
        t.addActionListener(this);
        p2.add(t);
        JButton u= new JButton("U");
        u.addActionListener(this);
        p2.add(u);
        JButton v= new JButton("V");
        v.addActionListener(this);
        p2.add(v);
        JButton w= new JButton("W");
        w.addActionListener(this);
        p2.add(w);
        JButton x= new JButton("X");
        x.addActionListener(this);
        p2.add(x);
        JButton y= new JButton("Y");
        y.addActionListener(this);
        p2.add(y);
        JButton z= new JButton("Z");
        z.addActionListener(this);
        p2.add(z);
        JButton BackSpace= new JButton("<-");
        BackSpace.addActionListener(this);
        p2.add(BackSpace);
        JButton Enter= new JButton("[");
        Enter.addActionListener(this);
        p2.add(Enter);

        this.getContentPane().add(p1,BorderLayout.NORTH);
        this.getContentPane().add(p2,BorderLayout.SOUTH);
        this.setVisible(true);    
    }

    public void actionPerformed(ActionEvent e) //need help with
    {
        if(e.getSource().equals("A"))
        {
            for(int r=0; r<g.length; r++)
            {
                for(int c=0; c<g[r].length; c++)
                {
                    g[r][c].setText("A");
                }
            }
        } 

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

这是我的代码,我的主要问题是使用ActionListener在JTEXTFIELDS的2D阵列中设置文本,我不介意单独使用每个字母的循环,只要有意义,并且按照我的意图来工作,如果您尚未注意到这是我要制作的游戏“ Wordle”,那么我仍然是新手程序员,所有这些对我来说都是新的,因此对某种直观的解释将不胜感激。

My assignment is to create 2 JPanels, one for a 2d array, 6 rows of 5 empty JTextFields and another for JButtons that should somewhat resemble an on-screen keyboard. I created the JPanels with the empty JTextFields and JButtons, now I need a way so that when I press a JButton with a letter from the alphabet it will assign that letter to the first available JTextField on the first available row and move one column at a time until the whole row is filled with letters (trying to add letters to a full row should do nothing). I also need to create a backspace button which I have that will remove the last letter (pressing backspace on an empty row should do nothing).

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

public class Wordle extends JFrame implements ActionListener 
{
    private JPanel p1;
    private JPanel p2;
    private JTextField [][] g;

    public Wordle()
    {
        setSize(500,300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        p1 = new JPanel();
        p1.setLayout(new GridLayout(6, 5));
        g=new JTextField [5][6];
        for(int r=0; r<g.length; r++)
        {
            for(int c=0; c<g[r].length; c++)
            {
                g[r][c]= new JTextField();
                getContentPane().add(g[r][c]);
                p1.add(g[r][c]);
            }
        }

        
        p2 = new JPanel();
        p2.setLayout(new GridLayout(4, 7));
        JButton a= new JButton("A");
        a.addActionListener(this);
        p2.add(a);
        JButton b= new JButton("B");
        b.addActionListener(this);
        p2.add(b);
        JButton c= new JButton("C");
        c.addActionListener(this);
        p2.add(c);
        JButton d= new JButton("D");
        d.addActionListener(this);
        p2.add(d);
        JButton e= new JButton("E");
        e.addActionListener(this);
        p2.add(e);
        JButton f= new JButton("F");
        f.addActionListener(this);
        p2.add(f);
        JButton g= new JButton("G");
        g.addActionListener(this);
        p2.add(g);
        JButton h= new JButton("H");
        h.addActionListener(this);
        p2.add(h);
        JButton i= new JButton("I");
        i.addActionListener(this);
        p2.add(i);
        JButton j= new JButton("J");
        j.addActionListener(this);
        p2.add(j);
        JButton k= new JButton("K");
        k.addActionListener(this);
        p2.add(k);
        JButton l= new JButton("L");
        l.addActionListener(this);
        p2.add(l);
        JButton m= new JButton("M");
        m.addActionListener(this);
        p2.add(m);
        JButton n= new JButton("N");
        n.addActionListener(this);
        p2.add(n);
        JButton o= new JButton("O");
        o.addActionListener(this);
        p2.add(o);
        JButton p= new JButton("P");
        p.addActionListener(this);
        p2.add(p);
        JButton q= new JButton("Q");
        q.addActionListener(this);
        p2.add(q);
        JButton r= new JButton("R");
        r.addActionListener(this);
        p2.add(r);
        JButton s= new JButton("S");
        s.addActionListener(this);
        p2.add(s);
        JButton t= new JButton("T");
        t.addActionListener(this);
        p2.add(t);
        JButton u= new JButton("U");
        u.addActionListener(this);
        p2.add(u);
        JButton v= new JButton("V");
        v.addActionListener(this);
        p2.add(v);
        JButton w= new JButton("W");
        w.addActionListener(this);
        p2.add(w);
        JButton x= new JButton("X");
        x.addActionListener(this);
        p2.add(x);
        JButton y= new JButton("Y");
        y.addActionListener(this);
        p2.add(y);
        JButton z= new JButton("Z");
        z.addActionListener(this);
        p2.add(z);
        JButton BackSpace= new JButton("<-");
        BackSpace.addActionListener(this);
        p2.add(BackSpace);
        JButton Enter= new JButton("[");
        Enter.addActionListener(this);
        p2.add(Enter);

        this.getContentPane().add(p1,BorderLayout.NORTH);
        this.getContentPane().add(p2,BorderLayout.SOUTH);
        this.setVisible(true);    
    }

    public void actionPerformed(ActionEvent e) //need help with
    {
        if(e.getSource().equals("A"))
        {
            for(int r=0; r<g.length; r++)
            {
                for(int c=0; c<g[r].length; c++)
                {
                    g[r][c].setText("A");
                }
            }
        } 

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

This is my code and my main issue is setting the text in the 2d array of JTextFields using actionlistener, I don't mind doing each if loop for each letter individually as long as it makes sense and works the way I intended it to, btw if you haven't already noticed this is the game "Wordle" I am trying to make, I'm still a newbie programmer and all of this is new to me so some kind of intuitive explanation would be much appreciated.

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绅刃 2025-02-05 13:25:39

此行if(e.getSource()。等于(“ a”))是您的第一个问题。它根本无法使用,因为e.getSource()返回一个永远不会等于“ a”的对象。

相反,您需要首先将源施放到正确的对象类型上:

public void actionPerformed(ActionEvent e) //need help with
{
    JButton clicked = (JButton)e.getSource();

现在我们可以从按钮中获取使用getText()这样的文本(尽管有一个更聪明的解决方案,我们可以在下面使用):

public void actionPerformed(ActionEvent e) //need help with
{
    JButton clicked = (JButton)e.getSource();

    if(clicked.getText().equals("A")) {
        ...

您面对的下一个问题是您如何存储数据,需要使用类变量跟踪当前单元格,而不仅仅是填充整个数组:

private int row = 0;
private int column = 0;

然后,所有的更改都可能有点像这样:

//Class variables
private int row = 0;
private int column = 0;

public void actionPerformed(ActionEvent e) //need help with
{
    //Cast the event source to a button
    JButton clicked = (JButton)e.getSource();

    //Handle backspace
    if(clicked.getText().equals("<-"))
    {
        //Decrease the tracking number
        column--;
        
        //Make sure that only valid cells are back spaced
        if(column < 0)
        {
            column = 0;
        }

        //Set the cell to be blank
        g[row][column].setText("");
    }

    //Handle enter
    else if(clicked.getText().equals("["))
    {
        //Add your behaviour here
        ....

        //Finally move to the next row
        row++;
    }

    //Handle the rest of the letter buttons here
    else
    {
        //We don't need `for` loops, we can just directly add the letter from
        //the clicked button to the correct place in the array like so
        g[row][column].setText(clicked.getText);

        //Increment the tracking numbers
        column++;
        
        //Move to the next row when the column value is over 5:
        if(column > 4)
        {
            //Move to the next row
            row++;
            //Reset the column number to 0
            column = 0;
        }
    }
}

This line if(e.getSource().equals("A")) is your first issue. It simply will not work because e.getSource() returns an object that will never equal "A".

Instead, you need to first cast the source to the correct object type like so:

public void actionPerformed(ActionEvent e) //need help with
{
    JButton clicked = (JButton)e.getSource();

Now we can now get the text from the button using use getText() like this (Although there is a smarter solution we can use down below):

public void actionPerformed(ActionEvent e) //need help with
{
    JButton clicked = (JButton)e.getSource();

    if(clicked.getText().equals("A")) {
        ...

The next issue you face is how you store the data, you need to track the current cell using a class variable, rather than just filling up the whole array:

private int row = 0;
private int column = 0;

Then all together the changes might look a bit like this:

//Class variables
private int row = 0;
private int column = 0;

public void actionPerformed(ActionEvent e) //need help with
{
    //Cast the event source to a button
    JButton clicked = (JButton)e.getSource();

    //Handle backspace
    if(clicked.getText().equals("<-"))
    {
        //Decrease the tracking number
        column--;
        
        //Make sure that only valid cells are back spaced
        if(column < 0)
        {
            column = 0;
        }

        //Set the cell to be blank
        g[row][column].setText("");
    }

    //Handle enter
    else if(clicked.getText().equals("["))
    {
        //Add your behaviour here
        ....

        //Finally move to the next row
        row++;
    }

    //Handle the rest of the letter buttons here
    else
    {
        //We don't need `for` loops, we can just directly add the letter from
        //the clicked button to the correct place in the array like so
        g[row][column].setText(clicked.getText);

        //Increment the tracking numbers
        column++;
        
        //Move to the next row when the column value is over 5:
        if(column > 4)
        {
            //Move to the next row
            row++;
            //Reset the column number to 0
            column = 0;
        }
    }
}
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