Java 添加JComboBox和JButton时GridBagLayout出现问题
在输出中,我不需要按钮4(Java 添加JComboBox和JButton时GridBagLayout出现问题,java,swing,layout-manager,gridbaglayout,insets,Java,Swing,Layout Manager,Gridbaglayout,Insets,在输出中,我不需要按钮4(b4)和按钮5(b5)之间的间隙,但我无法做到这一点,我也尝试了插入,但我的尝试是徒劳的。你能帮我解决一些建议或我犯过的错误吗 我注意到,当我同时添加JComboBox和JButton时,就会出现这个问题 甚至我也无法通过setBounds()或Inset类设置插入或边界 import java.awt.*; import java.awt.event.*; import javax.swing.*; public class FontWindow { Fon
b4
)和按钮5(b5
)之间的间隙,但我无法做到这一点,我也尝试了插入,但我的尝试是徒劳的。你能帮我解决一些建议或我犯过的错误吗
我注意到,当我同时添加JComboBox
和JButton
时,就会出现这个问题
甚至我也无法通过setBounds()
或Inset
类设置插入或边界
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FontWindow {
FontWindow() {
JFrame f = new JFrame();
JPanel p = new JPanel();
p.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
JComboBox c1,c2;
String clist1[] = {"Courier New","Times New Roman","Calibri"};
String clist2[] = {"8","9","10","11","12","14","16","18","20","22","24","26","28","36","72"};
c1 = new JComboBox(clist1);
c2 = new JComboBox(clist2);
gbc.gridx = 0;
gbc.gridy = 0;
p.add(c1,gbc);
gbc.gridx = 1;
gbc.gridy = 0;
p.add(c2,gbc);
JButton b1,b2,b3;
b1 = new JButton("B1");
b2 = new JButton("B2");
b3 = new JButton("B3");
//gbc.insets = new Insets(0,5,0,0);
gbc.gridx = 2;
gbc.gridy = 0;
p.add(b1,gbc);
gbc.gridx = 3;
gbc.gridy = 0;
p.add(b2,gbc);
gbc.gridx = 4;
gbc.gridy = 0;
p.add(b3,gbc);
JButton b4,b5,b6;
b4 = new JButton("B4");
b5 = new JButton("B5");
b6 = new JButton("B6");
//gbc.insets = new Insets(0,10,0,5);
gbc.anchor = GridBagConstraints.BELOW_BASELINE_LEADING;
gbc.gridx = 0;
gbc.gridy = 1;
p.add(b4,gbc);
gbc.gridx = 1;
gbc.gridy = 1;
p.add(b5,gbc);
gbc.gridx = 2;
gbc.gridy = 1;
p.add(b6,gbc);
f.setSize(600,400);
f.add(p);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
public static void main(String args[]) {
new FontWindow();
}
}
这是我得到的输出:
欢迎来到SO。请参见注释以跟踪约束中的更改:
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 3; //c1 is wide so let it span over 3 columns
p.add(c1,gbc);
gbc.gridwidth = 1;//reset span to 1
gbc.gridx = 3; //amend column numbers of row 0
gbc.gridy = 0;
p.add(c2,gbc);
JButton b1,b2,b3;
b1 = new JButton("B1");
b2 = new JButton("B2");
b3 = new JButton("B3");
gbc.gridx = 4;
gbc.gridy = 0;
p.add(b1,gbc);
gbc.gridx = 5;
gbc.gridy = 0;
p.add(b2,gbc);
gbc.gridx = 6;
gbc.gridy = 0;
p.add(b3,gbc);
//no change at the rest of the code
通过将布局划分为更小、更易于管理的JPanel
s,您可以使用更简单的布局管理器获得更好的控制例如,用
JPanel
包装每个组件行:
JPanel p = new JPanel();
p.setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
JPanel topRowPane = new JPanel();//uses FlowLayout by default
gbc.gridx = 0;
gbc.gridy = 0;
p.add(topRowPane,gbc);
String clist1[] = {"Courier New","Times New Roman","Calibri"};
String clist2[] = {"8","9","10","11","12","14","16","18","20","22","24","26","28","36","72"};
JComboBox<String> c1 = new JComboBox<>(clist1);
JComboBox<String> c2 = new JComboBox<>(clist2);
topRowPane.add(c1);
topRowPane.add(c2);
JButton b1 = new JButton("B1");
JButton b2 = new JButton("B2");
JButton b3 = new JButton("B3");
topRowPane.add(b1);
topRowPane.add(b2);
topRowPane.add(b3);
JPanel bottomRowPane = new JPanel();
gbc.anchor = GridBagConstraints.LINE_START;
gbc.gridx = 0;
gbc.gridy = 1;
p.add(bottomRowPane,gbc);
JButton b4 = new JButton("B4");
JButton b5 = new JButton("B5");
JButton b6 = new JButton("B6");
bottomRowPane.add(b4);
bottomRowPane.add(b5);
bottomRowPane.add(b6);
JPanel p=newjpanel();
p、 setLayout(新的GridBagLayout());
GridBagConstraints gbc=新的GridBagConstraints();
JPanel-topRowPane=新的JPanel()//默认情况下使用FlowLayout
gbc.gridx=0;
gbc.gridy=0;
p、 添加(顶行窗格,gbc);
字符串clist1[]={“Courier New”、“Times New Roman”、“Calibri”};
字符串clist2[]={“8”、“9”、“10”、“11”、“12”、“14”、“16”、“18”、“20”、“22”、“24”、“26”、“28”、“36”、“72”};
JComboBox c1=新的JComboBox(clist1);
JComboBox c2=新的JComboBox(clist2);
顶行窗格。添加(c1);
顶行窗格。添加(c2);
JButton b1=新JButton(“b1”);
JButton b2=新JButton(“b2”);
JButton b3=新JButton(“b3”);
顶行窗格。添加(b1);
topRowPane.add(b2);
topRowPane.add(b3);
JPanel bottomRowPane=新的JPanel();
gbc.anchor=GridBagConstraints.LINE\u START;
gbc.gridx=0;
gbc.gridy=1;
p、 添加(底部行窗格,gbc);
JButton b4=新JButton(“b4”);
JButton b5=新JButton(“b5”);
JButton b6=新JButton(“b6”);
底部行窗格。添加(b4);
底部行窗格。添加(b5);
底部行窗格。添加(b6);
1)提供最小尺寸的ASCII艺术或GUI预期布局的简单绘图,如果可以调整大小,则提供更宽和更高的宽度和高度,以显示应如何使用额外的空间。2) f.setSize(600400);f、 加(p)代码>应改为f.add(p);f、 pack();/*将GUI大小设置为显示组件所需的最小值*/