我需要为16个jbuttons中的每一个分配一个随机颜色,我的代码当前的方式,我得到一个随机颜色,但所有16个jbuttons都有相同的颜色。我理解为什么会这样,但我不知道如何解决它。万分感谢
package code;
import java.awt.Color;
import java.awt.GridLayout;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GameG implements Runnable {
public static JButton jba;
public static JPanel jp;
@Override
public void run(){
JFrame jf = new JFrame("Keybricks");
Random rnd = new Random();
jp = new JPanel();
jp.setLayout(new GridLayout(4, 1));
jf.setSize(300, 600);
jf.setVisible(true);
jf.setResizable(false);
jf.add(jp);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ArrayList<Color> colors = new ArrayList<>();
colors.add(Color.RED);
colors.add(Color.BLUE);
colors.add(Color.GREEN);
colors.add(Color.YELLOW);
Color randomColor = colors.get(rnd.nextInt(colors.size()));
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
ArrayList<Character> letters = new ArrayList<>(); {
for (char c : alphabet.toCharArray()) {
letters.add(c);
}
char randomLetter = letters.get(rnd.nextInt(letters.size()));
ArrayList<JButton> buttons = new ArrayList<>();
for (int i = 0; i < 16; i++){
JButton jb = new JButton();
buttons.add(jb);
jp.add(jb);
}
JButton randomJButton = buttons.get(rnd.nextInt(buttons.size()));
for (JButton button : buttons){
button.setBackground(randomColor);
button.setOpaque(true);
}
答案 0 :(得分:2)
您必须为每个按钮添加新生成的随机颜色。你拥有它的方式,你只生成一个随机颜色,并为每个按钮分配相同的随机颜色。
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ArrayList<Color> colors = new ArrayList<>();
colors.add(Color.RED);
colors.add(Color.BLUE);
colors.add(Color.GREEN);
colors.add(Color.YELLOW);
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
ArrayList<Character> letters = new ArrayList<>(); {
for (char c : alphabet.toCharArray()) {
letters.add(c);
}
char randomLetter = letters.get(rnd.nextInt(letters.size()));
ArrayList<JButton> buttons = new ArrayList<>();
for (int i = 0; i < 16; i++){
JButton jb = new JButton();
buttons.add(jb);
jp.add(jb);
}
JButton randomJButton = buttons.get(rnd.nextInt(buttons.size()));
for (JButton button : buttons){
Color randomColor = colors.get(rnd.nextInt(colors.size())); // Get a new random color
button.setBackground(randomColor);
button.setOpaque(true);
}