下面的代码生成九个单独的JPanel，其中有9个按钮。使用GridLayout将九个JPanel排列到基本JPanel上。然后使用Border Layout将此基础JPanel放置在ContentPane上。我正在为JButtons和每个单独的JPanel使用边框来清楚地定义它们的分离。每个JPanel内部的JButtons看起来很好但是JPanels之间存在间隙，导致双线的出现让我感到害怕。我已经尝试将每个单独的JPanel直接添加到ContentPane上但这没有任何作用。完全难过，想知道是否有人有任何建议？
P.S。我知道重复代码的大量需要以一种糟糕的方式重新分解它，这只是出于模拟的目的。
谢谢，
import java.awt.*;
import javax.swing.*;
import javax.swing.UIManager.*;
public class View1 extends JFrame
{
private JPanel basePanel;
private JPanel childPanel1;
private JPanel childPanel2;
private JPanel childPanel3;
private JPanel childPanel4;
private JPanel childPanel5;
private JPanel childPanel6;
private JPanel childPanel7;
private JPanel childPanel8;
private JPanel childPanel9;
private int row = 3;
private int column = 3;
private JButton[][] squares1;
private JButton[][] squares2;
private JButton[][] squares3;
private JButton[][] squares4;
private JButton[][] squares5;
private JButton[][] squares6;
private JButton[][] squares7;
private JButton[][] squares8;
private JButton[][] squares9;
private Font numberFont;
public View1()
{
setSize(400,400);
setTitle("2013");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
basePanel = new JPanel();
basePanel.setLayout(new GridLayout(row, column, 0, 0));
numberFont = new Font("sansserif", Font.BOLD, 32);
childPanel1Setup();
childPanel2Setup();
childPanel3Setup();
childPanel4Setup();
childPanel5Setup();
childPanel6Setup();
childPanel7Setup();
childPanel8Setup();
childPanel9Setup();
basePanel.add(childPanel1);
basePanel.add(childPanel2);
basePanel.add(childPanel3);
basePanel.add(childPanel4);
basePanel.add(childPanel5);
basePanel.add(childPanel6);
basePanel.add(childPanel7);
basePanel.add(childPanel8);
basePanel.add(childPanel9);
Container cp = getContentPane();
cp.setLayout(new BorderLayout());
cp.add(basePanel, BorderLayout.CENTER);
}
public void childPanel1Setup()
{
childPanel1 = new JPanel();
childPanel1.setLayout(new GridLayout(row, column, 0, 0));
childPanel1.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares1 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares1[rows][cols] = new JButton();
squares1[rows][cols].setSize(32, 32);
squares1[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares1[rows][cols].setBackground(Color.WHITE);
childPanel1.add(squares1[rows][cols]);
}
}
}
public void childPanel2Setup()
{
childPanel2 = new JPanel();
childPanel2.setLayout(new GridLayout(row, column, 0, 0));
childPanel2.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares2 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares2[rows][cols] = new JButton();
squares2[rows][cols].setSize(32, 32);
squares2[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares2[rows][cols].setBackground(Color.WHITE);
childPanel2.add(squares2[rows][cols]);
}
}
}
public void childPanel3Setup()
{
childPanel3 = new JPanel();
childPanel3.setLayout(new GridLayout(row, column, 0, 0));
childPanel3.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares3 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares3[rows][cols] = new JButton();
squares3[rows][cols].setSize(32, 32);
squares3[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares3[rows][cols].setBackground(Color.WHITE);
childPanel3.add(squares3[rows][cols]);
}
}
}
public void childPanel4Setup()
{
childPanel4 = new JPanel();
childPanel4.setLayout(new GridLayout(row, column, 0, 0));
childPanel4.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares4 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares4[rows][cols] = new JButton();
squares4[rows][cols].setSize(32, 32);
squares4[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares4[rows][cols].setBackground(Color.WHITE);
childPanel4.add(squares4[rows][cols]);
}
}
}
public void childPanel5Setup()
{
childPanel5 = new JPanel();
childPanel5.setLayout(new GridLayout(row, column, 0, 0));
childPanel5.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares5 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares5[rows][cols] = new JButton();
squares5[rows][cols].setSize(32, 32);
squares5[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares5[rows][cols].setBackground(Color.WHITE);
childPanel5.add(squares5[rows][cols]);
}
}
}
public void childPanel6Setup()
{
childPanel6 = new JPanel();
childPanel6.setLayout(new GridLayout(row, column, 0, 0));
childPanel6.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares6 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares6[rows][cols] = new JButton();
squares6[rows][cols].setSize(32, 32);
squares6[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares6[rows][cols].setBackground(Color.WHITE);
childPanel6.add(squares6[rows][cols]);
}
}
}
public void childPanel7Setup()
{
childPanel7 = new JPanel();
childPanel7.setLayout(new GridLayout(row, column, 0, 0));
childPanel7.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares7 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares7[rows][cols] = new JButton();
squares7[rows][cols].setSize(32, 32);
squares7[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares7[rows][cols].setBackground(Color.WHITE);
childPanel7.add(squares7[rows][cols]);
}
}
}
public void childPanel8Setup()
{
childPanel8 = new JPanel();
childPanel8.setLayout(new GridLayout(row, column, 0, 0));
childPanel8.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares8 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares8[rows][cols] = new JButton();
squares8[rows][cols].setSize(32, 32);
squares8[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares8[rows][cols].setBackground(Color.WHITE);
childPanel8.add(squares8[rows][cols]);
}
}
}
public void childPanel9Setup()
{
childPanel9 = new JPanel();
childPanel9.setLayout(new GridLayout(row, column, 0, 0));
childPanel9.setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares9 = new JButton[row][column];
for(int rows = 0; rows < this.row; rows++)
{
for(int cols = 0; cols < this.column; cols++)
{
squares9[rows][cols] = new JButton();
squares9[rows][cols].setSize(32, 32);
squares9[rows][cols].setBorder(BorderFactory.createLineBorder(Color.BLACK));
squares9[rows][cols].setBackground(Color.WHITE);
childPanel9.add(squares9[rows][cols]);
}
}
}
}
答案 0 :(得分：4)
我相信这是因为JPanel的布局管理器是FlowLayout，其中包含一个边距。创建面板时，将其布局设置为GridLayout，这将为您提供0余量。
您还为setVgap(0);完成了setHgap(0);和GridLayout吗？
答案 1 :(得分：1)
GridLayout使所有组件的大小相同。如果需要在JPanel内部布置3x3组件的矩阵，它是100x100像素，每个组件将是33x33像素，并且在右侧和底部将有额外的像素，因为100不是因子3.如果JPanel是101x101像素，所有四个边缘都会有额外的像素。
考虑使用GridBagLayout或Box或其他比GridLayout更智能的布局。