Question

我试图根据.txt文件中的内容添加JComponent 例如

在Component.txt

中

"[button]
buttonName
buttonText
Location(x,y)"

那么如何创建一个名为buttonName的JButton，在x＆amp;位置使用buttonText文本ÿ

这是我的代码：

private void btnRetrieveActionPerformed(java.awt.event.ActionEvent evt) {                                            
    String filename=txtFilename.getText()+".txt";
    int x=1;
    String text=null;
    String bname=new String(),btxt;
    double bsizex,bsizey,blocx,blocy;

    try (BufferedReader fw = new BufferedReader(new FileReader(new File(filename))))
    {
        String s;
        while((s = fw.readLine()) != null)
        {
            if(s.equals("[button]"))
            {
                String btnName = fw.readLine(); //read the next line after [a]
                JButton button1=new JButton(btnName);
                this.add(button1);
            }
        }
    }catch(IOException e)
    {
        e.printStackTrace();
    }
}

Answer 1

您需要阅读预期标记之后的每一行，直到您阅读了所期望的所有内容。

获得所有有效信息后，您需要解析结果并构建按钮，例如......

try (BufferedReader fw = new BufferedReader(new FileReader(new File(filename)))) {
    String s = null;
    while((s = fw.readLine()) != null) {
        if(s.equals("[button]")) {
            String btnName = fw.readLine();
            if (btnName != null) {
                String btnText = fw.readLine();
                if (btnText != null) {
                    String location = fw.readLine();
                    if (location != null) {
                        JButton button1=new JButton(btnText);
                        button1.setName(btnName);
                        //String xPos = location.substring(location.indexOf("(") + 1);
                        //String yPos = xPos.substring(xPos.indexOf(",") + 1);
                        //yPos = yPos.substring(0, yPos.indexOf(")"));
                        //xPos = xPos.substring(0, xPos.indexOf(","));
                        String parts[] = location.split(" ");
                        int x = Integer.parseInt(parts[0]);
                        int y = Integer.parseInt(parts[1]);
                        // Add this is where I tell you to use a layout manager...
                        this.add(button1);
                    }
                } else {
                    break;
                }
            } else {
                break;
            }
        }
    }
}catch(IOException e) {
    e.printStackTrace();
}

坦率地说，这种事情更适合XML

如何通过.txt文件添加JComponents

1 个答案: