Question

我有一只JTree,我把它作为树子。如果我选择一个新档案,选择与已经选定的文件相同,那么树木冻结有某种原因。它应当拆除含有树木的旧的JScrollPane,代之以新的树种,如果我选择一个不同的卷宗,则它会做罚款,但不是用同一个文档。全球倡议的其余部分仍在运作,它只是冻结的树木。相关法典:

if ("browse".equals(e.getActionCommand())) {
        returnVal = fc.showOpenDialog(DSAuto.this);
        if (returnVal == JFileChooser.APPROVE_OPTION) {
            File file = fc.getSelectedFile();
            filename = file.getAbsolutePath();
            l1.setText("Job Location: " + filename);
            c.fill = GridBagConstraints.BOTH;
            c.weightx = 1.0;
            c.gridx = 0;
            c.gridy = 1;
            c.gridwidth = 10;
            c.gridheight = 9;
            c.ipady = 0;
            if (rm)
                pane.remove(ft1);
            else
                pane.remove(sp1);
            if (rm2) {
                pane.remove(l3);
                rm2 = false;
            }
            if (!(file.isDirectory() || file.isFile())) {
                l3 = new JLabel("404 File Not Found");
                pane.add(l3, c);
                rm2 = true;
            } else {
                ft1 = new FileTree(file);
                ft1.all = allB;
                pane.add(ft1, c);
                rm = true;
            }
        }

    }

如果需要,我也可以为FileTree类提供法典。

Answer 1

It should be removing the old frame and replacing it with a new one

You can t add/remove a JFrame from a JFrame so I don t know what that comment means.

不要去除/去掉部分? 如果你想更新现有的构成部分,那么模式就会改变。也就是说:

tree.setModel(...);

或者如果你去除/去除部件,那么你需要使用:

panel.revalidate();
panel.repaint();

友情链接