Java - GUI - 不同大小、颜色的随机字符

Question

代码现已启动并运行。感谢 MadProgrammer 的所有帮助。他是个球手。

基本上，这段代码的主要内容是随机字符、随机大小和随机颜色。

下面是代码：

随机颜色：

int a = (int)(Math.random() * 255 - 0);
int b = (int)(Math.random() * 255 - 0);
int c = (int)(Math.random() * 255 - 0);
int z = (int)(Math.random() * 300 - 0);
Label.setForeground(new java.awt.Color(a, b, c));

随机大小：

Random rand = new Random();
int random = (int)(Math.random() * 100000 - 50000);
Label.setFont(new Font("Courier New", Font.ITALIC, z));

随机文本：

char randomChar = (char)(int)((Math.random() * 93) + 33);
Label.setText(String.valueOf(randomChar));

真实 OG 的完整代码：

package my.dimensional;

import java.awt.Color;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.util.Random;
import static javafx.scene.paint.Color.color;
import static javafx.scene.text.Font.font;
import static javafx.scene.text.Font.font;
import javax.swing.JLabel;

public class DimensionalUI extends javax.swing.JFrame 
{

    public DimensionalUI() 
    {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jFrame1 = new javax.swing.JFrame();
        jLabel2 = new javax.swing.JLabel();
        Run = new javax.swing.JButton();
        Label = new javax.swing.JLabel();

        javax.swing.GroupLayout jFrame1Layout = new javax.swing.GroupLayout(jFrame1.getContentPane());
        jFrame1.getContentPane().setLayout(jFrame1Layout);
        jFrame1Layout.setHorizontalGroup(
            jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        jFrame1Layout.setVerticalGroup(
            jFrame1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 300, Short.MAX_VALUE)
        );

        jLabel2.setText("jLabel2");

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        Run.setText("Run");
        Run.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                RunActionPerformed(evt);
            }
        });

        Label.setText("BOOM");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(Label, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(Run, javax.swing.GroupLayout.DEFAULT_SIZE, 247, Short.MAX_VALUE))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(Label, javax.swing.GroupLayout.PREFERRED_SIZE, 247, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 118, Short.MAX_VALUE)
                .addComponent(Run)
                .addContainerGap())
        );

        pack();
    }// </editor-fold>                        

    private void RunActionPerformed(java.awt.event.ActionEvent evt) {                                    
        Random rand = new Random();
        int random = (int)(Math.random() * 100000 - 50000);



        int a = (int)(Math.random() * 255 - 0);
        int b = (int)(Math.random() * 255 - 0);
        int c = (int)(Math.random() * 255 - 0);
        int z = (int)(Math.random() * 300 - 0);
        Label.setForeground(new java.awt.Color(a, b, c));
        Label.setFont(new Font("Courier New", Font.ITALIC, z));


        /*String[] fontNames = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
        int index = (int)(Math.random() * (fontNames.length - 1));
        String fontName = fontNames[index];
        Font font = new Font(fontName, Font.PLAIN, z);
        Label.setFont(new Font(fontName, Font.PLAIN, z));*/

        char randomChar = (char)(int)((Math.random() * 93) + 33);
        Label.setText(String.valueOf(randomChar));

    }                                   

    public static void main(String args[]) 
    {

        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(DimensionalUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(DimensionalUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(DimensionalUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(DimensionalUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() 
        {
            public void run() 
            {
                new DimensionalUI().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JLabel Label;
    private javax.swing.JButton Run;
    private javax.swing.JFrame jFrame1;
    private javax.swing.JLabel jLabel2;
    // End of variables declaration                   

    private void getAvailableFontFamilyNames() {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
}

Answer 1

颜色

Color 只是0-255 范围内的 3 个int 值...

int red = (int)(Math.random() * 255);
int green = (int)(Math.random() * 255);
int blue = (int)(Math.random() * 255);
Color color = new Color(red, green, blue);

字符

可以通过建立一个预定义的字符数组来实现，在0和数组length之间生成一个随机数，然后在指定位置提取元素，就个人而言，这是很多乏味的工作。

您可以将文本值中的值加载到 char 数组中，但同样，生成原始文件需要大量工作。

一个更简单的过程可能是计算33 和126 之间的随机值并将该数字转换为char，这将为您提供该值的ASCII 字符...

char randomChar = (char)(int)((Math.random() * 93) + 33);

字体

好吧，字体大小很简单。要获取可用字体名称的列表，您需要调用GraphicsEnvironment#getAvailableFontFamilyNames()，它将返回一个String 字体名称数组...

String[] fontNames = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();

然后您只需在 0 和数组 length 之间生成一个随机值...

int index = (int)(Math.random() * (fontNames.length - 1));

并提取所需的字体名称...

String fontName = fontNames[index];

然后你创建一个新字体...

Font font = new Font(fontName, Font.PLAIN, size);

Answer 2

为了能够从所有字符中随机选择，您首先必须将字符放入字符串数组中：

String[] chars = {0,1,2,3,4,5,a,b,c /*all characters you want to be printable*/ ,y,z};

然后绘制它们：

    Random randomGenerator = new Random();
    int random = randomGenerator.nextInt(chars.length + 2);  //randomly pic a number between 0 and the length of the array.
    Output.setText(chars[random]); //might have to convert to string

此外，我建议您将 randomGenerator 设为字段而不是局部变量，因为每次执行代码时都无需重新播种随机数生成器。