按钮数量达到一定值后如何增加按钮的值？

Question

我正在尝试使用 java swing 创建一组按钮。 我想用数字 5 增加按钮值，直到它们达到 60。之后它们应该随着数字 20 增加。在 100 之后，它们应该随着 50 增加。我的 for 循环构造有什么问题？

            ValueButton btn = new ValueButton((x + 1) * 5.0);
        for (int s = 0; s < btn.getValue(); s++) {
            if (btn.getValue() > 60.0) {
                  btn.setValue((x + 1) * 20.0);
                System.out.println("value: " + btn.getValue());
                if (btn.getValue() > 100.0) {
                    btn.setValue((x + 1) * 50.0);
                    System.out.println("value: " + btn.getValue());
                }
            }
        }

添加到界面的按钮：

  myButtons.add(btn, new GridBagConstraints(x % 4, y, 1, 1, 0.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE, new Insets(1, 1, 1, 1), 0, 0));
    }

根据 Anand Kumar 的回答编辑代码：

        pnlValueButtons.setLayout(new GridBagLayout());
        for (int x = 0, y = 0; x < 16; x++) {
            if (x % 4 == 0) {
                y++;
            }
                double buttonValue = 5.0;
            while (buttonValue <= 200) {
                ValueButton btn = new ValueButton(buttonValue);
                if (buttonValue < 60) {
                    buttonValue += 5.0;
                } else if (buttonValue < 100) {
                    buttonValue += 20.0;
                } else {
                    buttonValue += 50;
                }
      pnlValueButtons.add(btn, new GridBagConstraints(x % 4, y, 1, 1, 0.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE, new Insets(1, 1, 1, 1), 0, 0));
            }
}

Answer 1

我做的有点不同。

由于我们知道JButtons所需的值，因此我只需将 16 个值放入一个 int 数组中。 根据 OP 迄今为止告诉我们的内容，无需计算它们。

这是完整的可运行代码。

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class IncreasingJButtonExample implements Runnable {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new IncreasingJButtonExample());
    }

    @Override
    public void run() {
        JFrame frame = new JFrame("Increasing JButtons");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.add(createMainPanel(), BorderLayout.CENTER);

        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    private JPanel createMainPanel() {
        JPanel panel = new JPanel(new GridLayout(0, 4, 5, 5));
        panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        Font font = panel.getFont().deriveFont(24f);

        int[] values = { 5, 10, 15, 20, 40, 60, 80, 100, 150, 200, 
                250, 300, 350, 400, 450, 500 };

        for (int i = 0; i < values.length; i++) {
            JButton button = new JButton(Integer.toString(values[i]));
            button.setFont(font);
            button.setPreferredSize(new Dimension(100, 100));
            panel.add(button);
        }

        return panel;
    }

}

Answer 2

pnlValueButtons.setLayout(new GridBagLayout());
double buttonValue = 5.0;
for (int x = 0, y = 0; x < 16; x++) {
    if (x % 4 == 0) {
        y++;
    }
    ValueButton btn = new ValueButton(buttonValue);
    if (buttonValue < 60) {
        buttonValue += 5.0;
    } else if (buttonValue < 100) {
        buttonValue += 20.0;
    } else {
        buttonValue += 50;
    }
    pnlValueButtons.add(btn, new GridBagConstraints(x % 4, y, 1, 1, 0.0, 0.0, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE, new Insets(1, 1, 1, 1), 0, 0));
}