设置大小将无法在Java中工作 [英] set size wont work in java

问题描述

public void start_Gui() {

    JFrame window = new JFrame("Client Program");
    window.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE);

    JPanel panel = new JPanel();
    window.setContentPane(panel);
    panel.setLayout(new GridLayout(1,2));

    JLabel leftside = new JLabel();
    leftside.setLayout(new GridLayout(2, 1));

    JTextArea rightside = new JTextArea();
    rightside.setEditable(false);   //add scroll pane.
    rightside.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    rightside.setLayout(new FlowLayout());

    JTextArea client_text_input = new JTextArea();
    client_text_input.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    leftside.add(client_text_input);

    JLabel buttons_layer = new JLabel();
    JButton login = new JButton("Login");
    JButton logout = new JButton("Logout");
    buttons_layer.setBorder(BorderFactory.createLineBorder(Color.BLACK));
    buttons_layer.setLayout(new GridLayout(2, 1));
    buttons_layer.add(login);
    buttons_layer.add(logout);
    leftside.add(buttons_layer);

    panel.add(leftside);
    panel.add(rightside);

    window.setSize(300, 400);
    window.setResizable(false);
    window.setVisible(true);
}

我正在研究一个简单的Java聊天客户端gui应用程序.(服务器等，由其他人完成).

I am working on a simple java chat client gui application. (the server etc, is done by others).

这不是一个很大的项目，但是我唯一的问题是，无论如何我试图在上述GUI上调整任何组件的大小，都行不通.

It is not a big project, but my only problem is that whatever I do to try to resize any components on the above GUI, won't work.

例如:

JTextArea client_text_input = new JTextArea();
client_text_input.setSize(100,200);

不起作用.

感谢您的帮助.

推荐答案

在Swing中，您有两个布局选项:手动完成所有操作或让 LayoutManager 替您处理.

In Swing, you have two options for layout: do everything manually or let a LayoutManager handle it for you.

仅当您不使用 LayoutManager 时，调用 setSize()才有效.由于使用的是 GridLayout ，因此必须使用其他方法来指定所需的内容.

Calling setSize() will only work when you're not using a LayoutManager. Since you're using a GridLayout you'll have to use other ways to specify what you want.

尝试调用

Try calling setPreferredSize() and setMinimumSize().

这篇关于设置大小将无法在Java中工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！