我为一个项目工作，我想创建一个评级系统。 我希望当我按下第五颗星时，所有的星星变成红色，当我在第四颗星上时;第1个开始，第2个星和第3个星变成红色，依此类推。如果你能给我一些建议，我会很高兴的。谢谢！
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);
}
});
}
}
答案 0 :(得分：2)
要List<JToggleButton>和JPanel拥有默认FlowLayout，请添加JToggleButton的五个实例。为星形使用合适的Unicode字形，例如★ \u2605，如here所示。在您的ItemListener，setForground()为List红色或返回ItemEvent的每个元素，如getStateChange()中收到的{{1}}类型所示。
答案 1 :(得分：0)
对于所有5个按钮，您的动作非常相似。
您可以通过将这些操作放入方法
来使代码整洁public void buttonClicked(Button but)
然后将按钮传递给此方法：
buttonClicked(button1);
答案 2 :(得分：-2)
如果你想发展 对于可能在移动设备中使用的用户反馈系统的评级系统，请注意具有该专利的公司Lodsys。请参阅愤怒的小鸟公司的信息，该公司因其反馈系统而被起诉。 见http://www.geek.com/articles/mobile/lodsys-targets-angry-birds-maker-rovio-for-infringing-in-app-purchase-patent-20110725/ 请注意，Apple从他们那里购买了许可证，但独立律师表示，此许可证不包括由Apple以外开发的应用程序。