求助高手！想用GridBagLayout设置组件位置，设置不了啊啊啊啊

Question

想设置成5行1列的，可出来的是1行5列的！！这是为啥啊？
下面是全部代码：
import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;
public class SetFont extends JDialog implements ListSelectionListener{
public SetFont(){
win.setBounds(400,100,WIDTH,HEIGHT);
Container cont=win.getContentPane();
GridBagLayout grid=new GridBagLayout();
GridBagConstraints cons=new GridBagConstraints();
cons.gridwidth=GridBagConstraints.REMAINDER;
cons.fill=GridBagConstraints.HORIZONTAL;
//下面添加5个JPanel组件
grid.setConstraints(setFontList(),cons);
cont.add(setFontList());
grid.setConstraints(createFontShow(),cons);
cont.add(createFontShow());
grid.setConstraints(setFontSize(),cons);
cont.add(setFontSize());
grid.setConstraints(createFontBold(),cons);
cont.add(createFontBold());
grid.setConstraints(setButton(),cons);
cont.add(setButton());

cont.setLayout(grid);
win.setVisible(true);
}
private JScrollPane setFontList(){
fontList.addListSelectionListener(this);
JScrollPane scroll=new JScrollPane(fontList);
scroll.setSize(new Dimension(300,100));
return scroll;
}
public void valueChanged(ListSelectionEvent e)
{
fontTypeT=(String)fontList.getSelectedValue();
textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));
}
private JPanel createFontShow(){
String text=new String("text 预览 show");
textShow=new JLabel(text,0);
//textShow.setPreferredSize(new Dimension(WIDTH,200));
textShow.setVerticalAlignment(1);
textShow.setFont(font);
jp=new JPanel();
jp.add(textShow);
jp.setBorder(BorderFactory.createBevelBorder(1,Color.white,Color.gray));
return jp;
}
private JPanel setFontSize(){
String[] sizes={Integer.toString(fontSizeT),"12","16","20","24","28","32","36","40","44"};
jc=new JComboBox(sizes);
//jc.setBounds(300,200,100,100);
jp=new JPanel();
jc.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
fontSizeT=Integer.parseInt((String)jc.getSelectedItem());
textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT)); }});
jp.add(jc);
return jp;
}
private JPanel createFontBold(){
jp=new JPanel();
JRadioButton boldB=new JRadioButton("加粗");
JRadioButton italicB=new JRadioButton("倾斜"); 
boldB.addItemListener(new ItemListener(){
public void itemStateChanged(ItemEvent e){
if(e.getStateChange()==ItemEvent.SELECTED)
fontBoldT+=Font.BOLD;
else
fontBoldT-=Font.BOLD;
textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));}});
italicB.addItemListener(new ItemListener(){
public void itemStateChanged(ItemEvent e){
if(e.getStateChange()==ItemEvent.SELECTED)
fontBoldT+=Font.ITALIC;
else if(e.getStateChange()==ItemEvent.DESELECTED)
fontBoldT-=Font.ITALIC;
textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));}});
jp.add(boldB);
jp.add(italicB);
return jp;
}
private  JPanel setButton(){
JButton okB=new JButton("确定");
JButton exitB=new JButton("取消");
okB.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
fontType=fontTypeT;fontSize=fontSizeT;
font=new Font(fontTypeT,fontBoldT,fontSizeT);
win.setVisible(false); }});
exitB.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
font=new Font(fontType,fontBold,fontSize);
win.setVisible(false); }});
jp=new JPanel();
jp.add(okB);
jp.add(exitB);
jp.setBorder(BorderFactory.createLineBorder(Color.white));
return jp;
}
public static void main(String[] args){
new SetFont();
}
public Font getFont(){
return font;
}
public JFrame getWindow(){
return win;
}

//一次性变量，但需要声明为静态的
private static JComboBox jc;
private static JFrame win=new JFrame("在这里设置字体");
private static JLabel textShow;
private static int WIDTH=400,HEIGHT=500;
private static JPanel jp;
private static int a=0,b=1;

private String fontTypeT="微软雅黑",fontType=fontTypeT; //第1个为临时存储量,确定后将值传给fontType
private int fontBoldT=0,fontBold=fontBoldT;
private int fontSizeT=30,fontSize=fontSizeT; private Font font=new Font(fontTypeT,fontBoldT,fontSizeT);
private static GraphicsEnvironment e=GraphicsEnvironment.getLocalGraphicsEnvironment();
private static String[] fontNames=e.getAvailableFontFamilyNames();
private static JList fontList=new JList(fontNames);
}

Answer 1

我不是特别清楚为什么楼主的代码是横向输出的，改了几个地方不是很确定哪个起作用了，其实你只是简单的纵向输出用GridLayout就可以了，这里给贴了用GridBagLayout实现的，能够五行一列的情况（个人觉得一行五列或许更符合用户习惯）import javax.swing.*;
import java.awt.*;
import javax.swing.event.*;
import java.awt.event.*;public class SetFont extends JDialog implements ListSelectionListener{
    public SetFont(){
        win.setBounds(400,100,WIDTH,HEIGHT);
        Container cont=win.getContentPane();
        GridBagLayout grid=new GridBagLayout();
        cont.setLayout(grid);
        GridBagConstraints cons=new GridBagConstraints();
//        cons.gridwidth=GridBagConstraints.REMAINDER;
//        cons.fill=GridBagConstraints.HORIZONTAL;
        //下面添加5个JPanel组件
        JScrollPane fontList=setFontList();
        JPanel fontPanel=createFontShow();
        JPanel fontSize=setFontSize();
        JPanel fontBold=createFontBold();
        JPanel btnPanel=setButton();        cons.gridwidth=1;
        cons.gridheight=1;
        cons.gridx=0;
        cons.gridy=0;
        grid.setConstraints(fontList,cons);        cons.gridwidth=1;
        cons.gridheight=1;
        cons.gridx=0;
        cons.gridy=1;
        grid.setConstraints(fontPanel,cons);        cons.gridwidth=1;
        cons.gridheight=1;
        cons.gridx=0;
        cons.gridy=2;
        grid.setConstraints(fontSize,cons);        cons.gridwidth=1;
        cons.gridheight=1;
        cons.gridx=0;
        cons.gridy=3;
        grid.setConstraints(fontBold,cons);        cons.gridwidth=1;
        cons.gridheight=1;
        cons.gridx=0;
        cons.gridy=4;
        grid.setConstraints(btnPanel,cons);        cont.add(fontList);        cont.add(fontPanel);
        cont.add(fontSize);
        cont.add(fontBold);
        cont.add(btnPanel);
        win.pack();
        win.setVisible(true);
    }
    private JScrollPane setFontList(){
        fontList.addListSelectionListener(this);
        JScrollPane scroll=new JScrollPane(fontList);
        scroll.setSize(new Dimension(300,100));
        return scroll;
    }
    public void valueChanged(ListSelectionEvent e)
    {
        fontTypeT=(String)fontList.getSelectedValue();
        textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));
    }
    private JPanel createFontShow(){
        String text=new String("text 预览 show");
        textShow=new JLabel(text,0);
        //textShow.setPreferredSize(new Dimension(WIDTH,200));
        textShow.setVerticalAlignment(1);
        textShow.setFont(font);
        jp=new JPanel();
        jp.add(textShow);
        jp.setBorder(BorderFactory.createBevelBorder(1,Color.white,Color.gray));
        return jp;
    }
    private JPanel setFontSize(){
        String[] sizes={Integer.toString(fontSizeT),"12","16","20","24","28","32","36","40","44"};
        jc=new JComboBox(sizes);
        //jc.setBounds(300,200,100,100);
        jp=new JPanel();
        jc.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                fontSizeT=Integer.parseInt((String)jc.getSelectedItem());
                textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));    }});
        jp.add(jc);
        return jp;
    }
    private JPanel createFontBold(){
        jp=new JPanel();
        JRadioButton boldB=new JRadioButton("加粗");
        JRadioButton italicB=new JRadioButton("倾斜");
        boldB.addItemListener(new ItemListener(){
            public void itemStateChanged(ItemEvent e){
                if(e.getStateChange()==ItemEvent.SELECTED)
                    fontBoldT+=Font.BOLD;
                else
                    fontBoldT-=Font.BOLD;
                textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));}});
        italicB.addItemListener(new ItemListener(){
            public void itemStateChanged(ItemEvent e){
                if(e.getStateChange()==ItemEvent.SELECTED)
                    fontBoldT+=Font.ITALIC;
                else if(e.getStateChange()==ItemEvent.DESELECTED)
                    fontBoldT-=Font.ITALIC;
                textShow.setFont(new Font(fontTypeT,fontBoldT,fontSizeT));}});
        jp.add(boldB);
        jp.add(italicB);
        return jp;
    }
    private  JPanel setButton(){
        JButton okB=new JButton("确定");
        JButton exitB=new JButton("取消");
        okB.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                fontType=fontTypeT;fontSize=fontSizeT;
                font=new Font(fontTypeT,fontBoldT,fontSizeT);
                win.setVisible(false);
            }
        });
        exitB.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                font=new Font(fontType,fontBold,fontSize);
                win.setVisible(false);
            }
        });
        jp=new JPanel();
        jp.add(okB);
        jp.add(exitB);
        jp.setBorder(BorderFactory.createLineBorder(Color.white));
        return jp;
    }
    public static void main(String[] args){
        new SetFont();
    }
    public Font getFont(){
        return font;
    }
    public JFrame getWindow(){
        return win;
    }    //一次性变量，但需要声明为静态的
    private static JComboBox jc;
    private static JFrame win=new JFrame("在这里设置字体");
    private static JLabel textShow;
    private static int WIDTH=400,HEIGHT=500;
    private static JPanel jp;
    private static int a=0,b=1;    private String fontTypeT="微软雅黑",fontType=fontTypeT;        //第1个为临时存储量,确定后将值传给fontType
    private int fontBoldT=0,fontBold=fontBoldT;
    private int fontSizeT=30,fontSize=fontSizeT;    private Font font=new Font(fontTypeT,fontBoldT,fontSizeT);
    private static GraphicsEnvironment e=GraphicsEnvironment.getLocalGraphicsEnvironment();
    private static String[] fontNames=e.getAvailableFontFamilyNames();
    private static JList fontList=new JList(fontNames);
}