我为一个项目工作，我想创建一个评级系统。我希望当我按下第 5 颗星时，所有的星星都变成红色，当我按下第 4 颗星时；第一次开始，第二颗星和第三颗星变成红色，依此类推。如果你能给我一些建议，我会很高兴。谢谢你！
这是我的代码：
public class Rating {
private ArrayList<String> results = new ArrayList<String>();
private JLabel inputLabel1;
public static void main(String[] args) {
new Rating();
}
public Rating() {
JFrame f2 = new JFrame("Rating");
inputLabel1 = new JLabel("Rate: ");
Icon icon1 = new ImageIcon("star-icon.png");
Icon icon2 = new ImageIcon("star-3-icon.png");
JButton button1 = new JButton(icon1);
button1.setPreferredSize(new Dimension(35, 35));
button1.setBorder(BorderFactory.createEmptyBorder());
button1.setContentAreaFilled(false);
button1.setDisabledIcon(icon1);
button1.setPressedIcon(icon2);
button1.setSelectedIcon(icon2);
button1.setRolloverEnabled(true);
button1.setRolloverIcon(icon2);
button1.setRolloverSelectedIcon(icon2);
JButton button2 = new JButton(icon1);
button2.setPreferredSize(new Dimension(35, 35));
button2.setBorder(BorderFactory.createEmptyBorder());
button2.setContentAreaFilled(false);
button2.setDisabledIcon(icon1);
button2.setPressedIcon(icon2);
button2.setSelectedIcon(icon2);
button2.setRolloverEnabled(true);
button2.setRolloverIcon(icon2);
button2.setRolloverSelectedIcon(icon2);
JButton button3 = new JButton(icon1);
button3.setBorder(BorderFactory.createEmptyBorder());
button3.setContentAreaFilled(false);
button3.setDisabledIcon(icon1);
button3.setPressedIcon(icon2);
button3.setSelectedIcon(icon2);
button3.setPreferredSize(new Dimension(35, 35));
button3.setRolloverEnabled(true);
button3.setRolloverIcon(icon2);
button3.setRolloverSelectedIcon(icon2);
JButton button4 = new JButton(icon1);
button4.setPreferredSize(new Dimension(35, 35));
button4.setBorder(BorderFactory.createEmptyBorder());
button4.setContentAreaFilled(false);
button4.setDisabledIcon(icon1);
button4.setPressedIcon(icon2);
button4.setSelectedIcon(icon2);
button4.setRolloverEnabled(true);
button4.setRolloverIcon(icon2);
button4.setRolloverSelectedIcon(icon2);
JButton button5 = new JButton(icon1);
button5.setPreferredSize(new Dimension(35, 35));
button5.setBorder(BorderFactory.createEmptyBorder());
button5.setContentAreaFilled(false);
button5.setDisabledIcon(icon1);
button5.setPressedIcon(icon2);
button5.setSelectedIcon(icon2);
button5.setRolloverEnabled(true);
button5.setRolloverIcon(icon2);
button5.setRolloverSelectedIcon(icon2);
JButton button6 = new JButton("Subscribe");
button6.setPreferredSize(new Dimension(95, 35));
final JTextArea display = new JTextArea(5, 25);
JButton button7 = new JButton("Clear");
button7.setPreferredSize(new Dimension(95, 35));
JPanel panel2 = new JPanel();
f2.add(panel2);
f2.setVisible(true);
f2.setSize(500, 550);
f2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel2.add(inputLabel1);
panel2.add(button1);
panel2.add(button2);
panel2.add(button3);
panel2.add(button4);
panel2.add(button5);
panel2.add(button6);
panel2.add(button7);
panel2.add(display);
button1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String b1 = "1";
results.add(b1);
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
sb.append("\n");
}
}
});
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String b2 = "2";
results.add(b2);
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
sb.append("\n");
}
}
});
button3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String b3 = "3";
results.add(b3);
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
sb.append("\n");
}
}
});
button4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String b4 = "4";
results.add(b4);
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
sb.append("\n");
}
}
});
button5.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String b5 = "5";
results.add(b5);
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
sb.append("\n");
}
}
});
button6.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String s = display.getText().toString();
results.add(s);
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
sb.append("\n");
}
display.setText(sb.toString());
results.clear();
}
});
button7.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
results.clear();
StringBuilder sb = new StringBuilder();
for (String string : results) {
sb.append(string);
}
display.setText(null);
}
});
}
}