java.lang.Object
 Ｌ java.awt.GridLayout

public class GridLayout extends Object implements LayoutManager, Serializable

GridLayoutクラスのコンストラクタ

GridLayout
public GridLayout()

JPanel panel = new JPanel();
panel.setLayout(new GridLayout());

サンプルプログラム

/**
 * GridLayoutクラスの定義とコンストラクタ
 */
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.BorderLayout;

public class GridLayoutTest1 extends JFrame{

  public static void main(String[] args){
    GridLayoutTest1 frame = new GridLayoutTest1();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("タイトル");
    frame.setVisible(true);
  }

  GridLayoutTest1(){
    JButton button1 = new JButton("Button1");
    JButton button2 = new JButton("Button2");
    JButton button3 = new JButton("Button3");

    JPanel p = new JPanel();
    p.setLayout(new GridLayout());

    p.add(button1);
    p.add(button2);
    p.add(button3);

    getContentPane().add(p, BorderLayout.CENTER);
  }
}

GridLayout
public GridLayout(int rows,
                  int cols)

JPanel p = new JPanel();
p.setLayout(new GridLayout(5,3));

メソッドで指定する

setRows
public void setRows(int rows)

setColumns
public void setColumns(int cols)

JPanel p = new JPanel();
GridLayout layout = new GridLayout();
layout.setRows(5);
layout.setColumns(3);
p.setLayout(layout);

サンプルプログラム

/**
 * 行と列の数を指定する
 */
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.BorderLayout;

public class GridLayoutTest2 extends JFrame{

  public static void main(String[] args){
    GridLayoutTest2 frame = new GridLayoutTest2();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("タイトル");
    frame.setVisible(true);
  }

  GridLayoutTest2(){
    JButton button1 = new JButton("Button1");
    JButton button2 = new JButton("Button2");
    JButton button3 = new JButton("Button3");
    JLabel label1 = new JLabel("Label1");
    JLabel label2 = new JLabel("Label2");

    JPanel p = new JPanel();
    p.setLayout(new GridLayout(3, 2));

    p.add(button1);
    p.add(label1);
    p.add(label2);
    p.add(button2);
    p.add(button3);

    getContentPane().add(p, BorderLayout.CENTER);
  }
}

行数に「0」以外を指定した場合

JPanel p = new JPanel();
p.setLayout(new GridLayout(2, 2));

行数に「0」を指定した場合

JPanel p = new JPanel();
p.setLayout(new GridLayout(0, 2));

GridLayout
public GridLayout(int rows,
                  int cols,
                  int hgap,
                  int vgap)

JPanel p = new JPanel();
p.setLayout(new GridLayout(2, 2, 10, 5));

メソッドを使って設定する

setHgap
public void setHgap(int hgap)

setVgap
public void setVgap(int vgap)

JPanel p = new JPanel();
GridLayout layout = new GridLayout();
layout.setHgap(10);
layout.setVgap(5);

p.setLayout(layout);

サンプルプログラム

/**
 * コンポーネント間の間隔を設定する
 */
import javax.swing.*;
import java.awt.GridLayout;
import java.awt.BorderLayout;

public class GridLayoutTest4 extends JFrame{

  public static void main(String[] args){
    GridLayoutTest4 frame = new GridLayoutTest4();

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(10, 10, 300, 200);
    frame.setTitle("タイトル");
    frame.setVisible(true);
  }

  GridLayoutTest4(){
    JButton button1 = new JButton("button1");
    JButton button2 = new JButton("button2");
    JButton button3 = new JButton("button3");
    JButton button4 = new JButton("button4");

    JPanel p = new JPanel();
    GridLayout layout = new GridLayout(2, 2);
    layout.setHgap(10);
    layout.setVgap(5);
    p.setLayout(layout);

    p.add(button1);
    p.add(button2);
    p.add(button3);
    p.add(button4);

    getContentPane().add(p, BorderLayout.CENTER);
  }
}