borderlayoutのcenter部分の幅を狭めたい

前提・実現したいこと

borderlayoutのcenter部分の幅を狭めたい。

ここに質問の内容を詳しく書いてください。
Calculatorの　＝？？のボタンをもっと上に持ってきてしたに余白を作りたいです。

発生している問題・エラーメッセージ

該当のソースコード

Java
1package Example;
2
3import java.awt.BorderLayout;
4import java.awt.Color;
5import java.awt.Container;
6import java.awt.Dimension;
7import java.awt.GridLayout;
8import javax.swing.BoxLayout;
9import javax.swing.JButton;
10import javax.swing.JFrame;
11import javax.swing.JLabel;
12import javax.swing.JPanel;
13import javax.swing.JSpinner;
14import javax.swing.JTextArea;
15import javax.swing.JTextField;
16import javax.swing.SpinnerNumberModel;
17import javax.swing.border.TitledBorder;
18
19public class MyGui {
20
21    public static void main(String[] args) {
22        //==========================================
23        //Build "person" panel
24        //==========================================
25        JPanel personPanel = new JPanel();
26        personPanel.setBackground(Color.GREEN);
27        personPanel.setBorder(new TitledBorder("Person Information"));
28        personPanel.setLayout(new BorderLayout());
29
30        //---------------------------
31        //Build the Editor sub Panel
32        //---------------------------
33        JPanel personEditor = new JPanel();
34        personEditor.setBackground(Color.LIGHT_GRAY);
35        personEditor.setLayout(new GridLayout(3, 1));
36
37        JLabel first = new JLabel("First Name : ");
38        JLabel last = new JLabel("Last Name : ");
39        JLabel id = new JLabel("ID# : ");
40
41        JTextField firstTxt = new JTextField(10);
42        JTextField lastTxt = new JTextField(10);
43        JTextField idTxt = new JTextField(10);
44
45        personEditor.add(first);
46        personEditor.add(firstTxt);
47        personEditor.add(last);
48        personEditor.add(lastTxt);
49        personEditor.add(id);
50        personEditor.add(idTxt);
51
52        //attached the sub panel editor to the person panel
53        personPanel.add(personEditor, BorderLayout.NORTH);
54
55        //---------------------------
56        //Build the Button sub Panel
57        //---------------------------
58        JPanel personButtons = new JPanel();
59        personButtons.setBackground(Color.CYAN);
60
61        JButton createPerson = new JButton("Add");
62        personButtons.add(createPerson);
63        JButton deletePerson = new JButton("Remove");
64        personButtons.add(deletePerson);
65
66        //attached the sub panel editor to the person panel
67        personPanel.add(personButtons, BorderLayout.SOUTH);
68
69        //---------------------------
70        //Build the Display sub Panel
71        //---------------------------
72        JPanel display = new JPanel();
73        display.setBackground(Color.MAGENTA);
74        personPanel.add(display, BorderLayout.CENTER);
75
76        //==========================================
77        //Build "output" panel
78        //==========================================
79        JPanel outputPanel = new JPanel();
80        outputPanel.setBackground(Color.YELLOW);
81        outputPanel.setBorder(new TitledBorder("Display Results"));
82        outputPanel.setLayout(new BorderLayout());
83
84        //---------------------------
85        //Build the Button sub Panel
86        //---------------------------
87        JPanel outputButtons = new JPanel();
88        outputButtons.setBackground(Color.ORANGE);
89
90        JButton drawMatrix = new JButton("Draw Matrix");
91        outputButtons.add(drawMatrix);
92
93        //attached the sub panel editor to the output panel
94        outputPanel.add(outputButtons, BorderLayout.SOUTH);
95
96        //---------------------------
97        //Build the Result sub Panel
98        //---------------------------
99        JTextArea outputArea = new JTextArea();
100        outputPanel.add(outputArea, BorderLayout.CENTER);
101
102//        
103        //==========================================
104        //Build "calculate" panel
105        //==========================================
106        JPanel calculatePanel = new JPanel();
107        calculatePanel.setBackground(Color.PINK);
108        calculatePanel.setBorder(new TitledBorder("Calculator"));
109        calculatePanel.setLayout(new BorderLayout());
110
111        //---------------------------
112        //Build the spinner
113        //---------------------------
114        JPanel calculateSpinner = new JPanel();
115        calculateSpinner.setBackground(Color.RED);
116        calculateSpinner.setLayout(new GridLayout(2, 1));
117
118        JSpinner sp1 = new JSpinner();
119        calculateSpinner.add(sp1);
120        sp1.getValue();
121
122        JSpinner sp2 = new JSpinner();
123        calculateSpinner.add(sp2);
124        sp2.getValue();
125
126        calculatePanel.add(calculateSpinner, BorderLayout.NORTH);
127        //---------------------------
128        //Build the + - Button
129        //---------------------------
130        JPanel calculateButtons = new JPanel();
131        calculateButtons.setBackground(Color.LIGHT_GRAY);
132        Dimension d = new Dimension(30, 50);
133        calculateButtons.setSize(d);
134
135        JButton plus = new JButton("+");
136        calculateButtons.add(plus);
137
138        JButton minas = new JButton("-");
139        calculateButtons.add(minas);
140
141        //attached the sub panel editor to the calculate panel
142        calculatePanel.add(calculateButtons, BorderLayout.CENTER);
143        //calculatePanel.setPreferredSize(new Dimension(200, 50));
144
145        //---------------------------
146        //Build the = ?? Button
147        //---------------------------
148        JPanel totalButtons = new JPanel();
149
150        totalButtons.setBackground(Color.RED);
151
152        JButton total = new JButton("= ??");
153
154        totalButtons.add(total);
155
156        //attached the sub panel editor to the calculate panel
157        calculatePanel.add(totalButtons, BorderLayout.SOUTH);
158
159        //==========================================
160        //My window, and it packs everyting together
161        //==========================================
162        JFrame window = new JFrame();
163
164        window.setTitle("GUI with no ActionListeners");
165
166        window.add(personPanel, BorderLayout.WEST);
167
168        window.add(outputPanel, BorderLayout.CENTER);
169
170        window.add(calculatePanel, BorderLayout.EAST);
171
172        //set the size to described dimensions
173//        Dimension d = new Dimension(455, 500);
174//        window.setSize(d);
175        
176        //calculating layout and sizes everything fits
177        window.pack();
178
179        //show it!
180        window.setVisible(true);
181
182        //end the program and this window closes properly        
183        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
184
185    }//end of main  
186}//end of class
187

試したこと

Dimension d = new Dimension(30, 50);
calculateButtons.setSize(d);や
calculatePanel.setPreferredSize(new Dimension(200, 50));の挿入

補足情報（FW/ツールのバージョンなど）

ここにより詳細な情報を記載してください。

K_3578

2021/04/05 03:45

>borderlayoutのcenter部分の幅を狭めたい。 >Calculatorの　＝？？のボタンをもっと上に持ってきてしたに余白を作りたいです。質問はどちら？

Gingerale09

2021/04/05 03:58

質問は　＝？？　のボタンをもっと上に持ってきて下に余白を作りたいです！わかりにくくてすみません。

TN8001

2021/04/05 09:12

提示コードを実行しても画像のようにはなりませんが、なってほしい状態の画像ということですか？

Gingerale09

2021/04/05 10:49

失礼しました。画像はなって欲しい状態です。全体的に上に集めた感じにしたいのですが、どうやってやるのかわかりません。

行動規範の内容に同意します

回答1件

ベストアンサー

BorderLayout.CENTERが広がってしまうのは、「そういう性質だから」と言うしかないですね。

順に積みたいのであれば、BoxLayoutにしたらどうですか？

Java
1import java.awt.BorderLayout;
2import java.awt.Color;
3import java.awt.Dimension;
4import java.awt.GridLayout;
5import javax.swing.Box;
6import javax.swing.BoxLayout;
7import javax.swing.JButton;
8import javax.swing.JFrame;
9import javax.swing.JPanel;
10import javax.swing.JSpinner;
11import javax.swing.border.TitledBorder;
12
13public class MyGui {
14
15    public static void main(String[] args) {
16        //==========================================
17        //Build "person" panel
18        //==========================================
19        JPanel personPanel = new JPanel(new BorderLayout());
20        personPanel.setBackground(Color.GREEN);
21        personPanel.setBorder(new TitledBorder("Person Information"));
22        // 実コードでは不要 中身を省略でつぶれないようにするってだけ
23        personPanel.setPreferredSize(new Dimension(150, 150));
24
25        //==========================================
26        //Build "output" panel
27        //==========================================
28        JPanel outputPanel = new JPanel(new BorderLayout());
29        outputPanel.setBackground(Color.YELLOW);
30        outputPanel.setBorder(new TitledBorder("Display Results"));
31        // 実コードでは不要 中身を省略でつぶれないようにするってだけ
32        outputPanel.setPreferredSize(new Dimension(150, 150));
33
34
35        //==========================================
36        //Build "calculate" panel
37        //==========================================
38        JPanel calculatePanel = new JPanel();
39        calculatePanel.setBackground(Color.PINK);
40        calculatePanel.setBorder(new TitledBorder("Calculator"));
41
42        // icalculatePanelの中にさらにBox（BoxLayoutになってるJPanel）
43        Box calculatePanelInnerBox = new Box(BoxLayout.Y_AXIS);
44        calculatePanel.add(calculatePanelInnerBox);
45
46        //---------------------------
47        //Build the spinner
48        //---------------------------
49        JPanel calculateSpinner = new JPanel(new GridLayout(2, 1));
50        calculateSpinner.setBackground(Color.RED);
51
52        calculateSpinner.add(new JSpinner());
53        calculateSpinner.add(new JSpinner());
54
55        calculatePanelInnerBox.add(calculateSpinner);
56
57        //---------------------------
58        //Build the + - Button
59        //---------------------------
60        JPanel calculateButtons = new JPanel();
61        calculateButtons.setBackground(Color.LIGHT_GRAY);
62        calculateButtons.add(new JButton("+"));
63        calculateButtons.add(new JButton("-"));
64
65        calculatePanelInnerBox.add(calculateButtons);
66
67        //---------------------------
68        //Build the = ?? Button
69        //---------------------------
70        JPanel totalButtons = new JPanel();
71        totalButtons.setBackground(Color.RED);
72        totalButtons.add(new JButton("= ??"));
73
74        calculatePanelInnerBox.add(totalButtons);
75
76
77        //==========================================
78        //My window, and it packs everyting together
79        //==========================================
80        JFrame window = new JFrame("GUI with no ActionListeners");
81        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
82
83        window.add(personPanel, BorderLayout.WEST);
84        window.add(outputPanel, BorderLayout.CENTER);
85        window.add(calculatePanel, BorderLayout.EAST);
86        window.pack();
87
88        window.setVisible(true);
89    }
90}