如何清除MigLayout中兩個單元格之間的垂直間隙？

Question

非常簡單的問題：我如何消除包含兩個JCheckBox的兩個單元之間的垂直間隙？我用紅色邊框標出了圖片中的空白。

這裏是代碼：

import javax.swing.JButton; 
import javax.swing.JCheckBox; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 

import net.miginfocom.swing.MigLayout; 

public class Main { 
    public static void main(String[] args) { 
     JPanel somePanel = new JPanel(); 
     somePanel.setLayout(new MigLayout("insets 0, debug", "", "")); 
     somePanel.add(new JCheckBox("first option"), "h 20!"); 
     somePanel.add(new JButton("click me"), "spany 2, h 40!, w 60%, wrap"); 
     somePanel.add(new JCheckBox("option two"), "h 20!"); 

     JFrame frame = new JFrame(); 
     frame.setContentPane(somePanel); 
     frame.pack(); 
     frame.setVisible(true); 
    } 
} 

Answer 1

最小差距在無論是在該行/列約束定義是否應特定行/只列之間施加他們：

new MigLayout("insets 0, debug", "", "[]0[]")); 

（琢磨了一下，這並不爲你工作很在這裏很好:)

或如果他們應該都行之間施加的layoutContraints：

new MigLayout("insets 0, gapy 0, debug")); 

BTW：佈局「編碼」應˚F遵循與所有編碼相同的規則，f.i.幹:-)特別是，我的規則是不重複組件約束，如果你可以實現佈局/行約束的目標。在這個例子中，你可以擺脫所有組件的約束，除了由跨越：

somePanel.setLayout(new MigLayout("insets 0, debug, wrap 2", 
     "[][60%, fill]", "[20!, fill]0")); 
somePanel.add(new JCheckBox("first option")); 
somePanel.add(new JButton("click me"), "spany 2"); 
somePanel.add(new JCheckBox("option two")); 

Answer 2

好吧，我只是找到了一個很好的解決方案使用的對接：

import javax.swing.JButton; 
import javax.swing.JCheckBox; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 

import net.miginfocom.swing.MigLayout; 

public class Main { 
    public static void main(String[] args) { 
     JPanel somePanel = new JPanel(); 
     somePanel.setLayout(new MigLayout("insets 0, debug", "", "")); 
     somePanel.add(new JButton("click me"), "east"); 
     somePanel.add(new JCheckBox("first option"), "north"); 
     somePanel.add(new JCheckBox("option two"), "south"); 

     JFrame frame = new JFrame(); 
     frame.setContentPane(somePanel); 
     frame.pack(); 
     frame.setVisible(true); 
    } 
} 

但我會怎麼做，如果對接不是一種選擇？

Answer 3

另一種解決方案是在細胞分裂成兩個子電池，將複選框出現，並應用組件缺口約束。

package com.zetcode; 

import javax.swing.JButton; 
import javax.swing.JCheckBox; 
import javax.swing.JComponent; 
import javax.swing.JFrame; 
import javax.swing.SwingUtilities; 

import net.miginfocom.swing.MigLayout; 

/* 
Demonstrating component gaps in MigLayout manager. 
Author: Jan Bodnar 
Website: zetcode.com 
*/ 
public class MigLayoutGapsEx extends JFrame { 

    public MigLayoutGapsEx() { 

     initUI(); 
    } 

    private void initUI() { 

     JCheckBox cb1 = new JCheckBox("First option"); 
     JCheckBox cb2 = new JCheckBox("Second option"); 

     JButton btn = new JButton("Click me"); 

     createLayout(cb1, cb2, btn); 

     setTitle("MigLayout example"); 
     setLocationRelativeTo(null); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    } 

    private void createLayout(JComponent... arg) { 

     setLayout(new MigLayout()); 

     add(arg[0], "split 2, flowy"); 
     add(arg[1], "gapy 0"); 
     add(arg[2]); 

     pack(); 
    } 

    public static void main(String[] args) { 

     SwingUtilities.invokeLater(() -> { 
      MigLayoutGapsEx ex = new MigLayoutGapsEx(); 
      ex.setVisible(true); 
     }); 
    } 
} 

下面是截圖：