Question

我在Java中遇到一个巨大的问题，即创建一个GUI，它从用户那里获取输入并根据该输入创建一个圆圈。我正在从用户那里获取输入并保存getUserX，getUserY，getRadius和circleColor中的值，但是我不知道如何将这些变量传递给一个由paint组件用来创建一个圆的数组。 / p>

如何正确获取getUserX，getUserY和getRadius变量的值并将它们放入circleValues数组？如何从用户输入中获取circleColor并将其作为创建的圆的page.setColor值？

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CircleMaker 
{

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

public static void BuildsFrame()
{
    JFrame frame = new JFrame ("Circle Drawer");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTabbedPane tp = new JTabbedPane();
    tp.addTab ("Intro", new IntroPanel());
    tp.addTab("Your Circle!", new CirclePanel());

    frame.getContentPane().add(tp);
    frame.pack();
    frame.setVisible(true);
}

}

class IntroPanel extends JPanel
{
public IntroPanel()
{
    final JTextField xCoorTF, yCoorTF, radiusTF;
    int userXcoor, userYcoor, userRadius;

    JButton makeButton = new JButton("Create!");
    final JColorChooser colorChooser;


    setLayout (new FlowLayout());
    setBackground (Color.gray);
    setPreferredSize (new Dimension(700, 500));

    JLabel l1 = new JLabel ("Enter your desired coordinates and radius for your circle.");
    JLabel l2 = new JLabel ("Please type the X coordinate in the first box, the");
    JLabel l3 = new JLabel ("Y coordinates in the second box,");
    JLabel l4 = new JLabel ("and the radius of your circle");
    JLabel l5 = new JLabel ("in the final box.");

    xCoorTF = new JTextField(5);
    yCoorTF = new JTextField(5);
    radiusTF = new JTextField(5);



    colorChooser = new JColorChooser();
    colorChooser.setBorder(BorderFactory.createTitledBorder("Choose Circle Color:"));



    makeButton.addActionListener(new ActionListener()
    {
        public void actionPerformed(ActionEvent e){

            int getUserX = Integer.parseInt(xCoorTF.getText());
            int getUserY = Integer.parseInt(yCoorTF.getText());
            int getRadius = Integer.parseInt(radiusTF.getText());
            Color circleColor = colorChooser.getColor();
            System.out.println(getUserX);
            System.out.println(getUserY);
            System.out.println(getRadius);

        }   
    });



    add (l1);
    add (l2);
    add (l3);
    add (l4);
    add (l5);
    add (xCoorTF);
    add (yCoorTF);
    add (radiusTF);
    add (colorChooser);
    add (makeButton);

}
}

class CirclePanel extends JPanel
{
int[] circleValues = {50, 50, 100}; 

circleValues[0] = getUserX;
circleValues[1] = getUserY;
circleValues[2] = getRadius;

public CirclePanel()
{
    setBackground (Color.WHITE);

}

public void paintComponent (Graphics page)
{
    super.paintComponent (page);
    page.setColor (Color.BLACK);
    page.fillOval((circleValues[0] - 2), (circleValues[1] - 2), (circleValues[2] + 4), (circleValues[2] + 4));
    page.setColor (Color.GRAY);
    page.fillOval (circleValues[0], circleValues[1], (circleValues[2]), (circleValues[2]));
}

}

Answer 1

与许多其他语言不同，命令不能在空间中浮动＆＃34;在Java。

您需要提高该数据的范围，并将 circleValues 数组填充移动到将要执行的代码段。

如何从Action Event中获取一个数组以在Java中创建一个圆圈？

1 个答案: