如何在Java Swing中控制JTextField的宽度？ [英] How can I control the width of JTextFields in Java Swing?

问题描述

我试图在一行上有几个JTextField，但我不希望它们具有相同的宽度。如何控制宽度并使其中一些宽度比其他宽度更宽？我希望他们一起占据总宽度的100％，所以如果我可以使用某种形状的话会很好。

I am trying to have several JTextFields on a single row, but I don't want them to have the same width. How can I control the width and make some of them wider than others? I want that they together take up 100% of the total width, so it would be good if I could use some kind of weigthing.

我试过 .setColumns（）但它没有意义。

这是一个例子，我用三行三字符串应显示在列中：

Here is an example, where I am using three rows with three strings that should appear as in columns:

import java.awt.GridLayout;
import javax.swing.BoxLayout;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class RowTest extends JPanel {

    class Row extends JComponent {
        public Row(String str1, String str2, String str3) {
            this.setLayout(new BoxLayout(this, BoxLayout.X_AXIS));

            JTextField fld1 = new JTextField(str1);
            JTextField fld2 = new JTextField(str2);
            JTextField fld3 = new JTextField(str3);

            fld1.setColumns(5); // makes no sense

            this.add(fld1);
            this.add(fld2);
            this.add(fld3);
        }
    }

    public RowTest() {
    this.setLayout(new GridLayout(5,0));

    this.add(new Row("Short", "A long text that takes up more space",
        "Short again"));
    this.add(new Row("Longer but short", "Another long string", "Short"));
    this.add(new Row("Hello", "The long field again",
        "Some info"));
    }

    public static void main(String[] args) {
        new JFrame() {{ this.getContentPane().add(new RowTest());
                            this.pack(); this.setVisible(true); }};
    }

}

推荐答案

所有Swing组件都有首选大小。文本组件的首选大小基于组件的文本。因此，通常组件按其首选大小绘制。

All Swing components have a preferred size. The preferred size of a text component is based on the text of the component. So generally the component is painted at its preferred size.

所以我没有看到您的代码片段存在问题。每个文本字段应具有不同的首选大小。此外，随着帧的大小调整，宽度将被调整，因为BoxLayout将尝试将每个组件的大小调整为其最大/最小大小。

So I don't see the problem with your code snippet. Each text field should have a different preferred size. Also, as the frame is resized the width will be adjusted since the BoxLayout will try to resize each component up to its maximum/minimum size.

如果您需要更多帮助帖子您的 SSCCE 实际上展示了您遇到的尺寸问题。

If you need more help post your SSCCE that actually demonstrates the sizing problem you are experiencing.

编辑：

根据最新要求，您可以使用相对布局。

Based on the latest requirement you can use the Relative Layout.

这篇关于如何在Java Swing中控制JTextField的宽度？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！