我正在创建一个我想要向上和向下滚动的定制表,所以我使用的是JScrollPane。
我的问题是,每次我在表格中添加另一行时,它会将其添加到最后一行的一侧,而不是在最后一行的下方,这是我想要的那一行。例如,它是向表而不是行添加列。
需要添加的行数不确定,具体取决于表中的条目数。
我知道我可以使用表格但是出于本练习的目的,我想这样做。
以下是我的代码的MCVE版本,用于演示此问题。我把颜色改变了,所以字段更明显:
public class Customers {
public static JFrame frame = new JFrame();
public static void frameGui(JPanel panel, String name){
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.setSize(1200,500);
frame.setVisible(true);
}
public static void ScrollCustomersGui(){
JPanel Table = new JPanel();
Table.add(customersTableHeadings(Table));
Table.add(customersTableHeadings(Table));
Table.add(customersTableHeadings(Table));
JScrollPane scroll = new JScrollPane(Table);
JPanel All = new JPanel(new BorderLayout());
All.add(scroll);
frameGui(All, "Customers");
}
public static JPanel customersTableHeadings(JPanel panel){
FlowLayout FlowCustTable = (FlowLayout)panel.getLayout();
FlowCustTable.setHgap(0);
JPanel customersTable = new JPanel(FlowCustTable);
JTextField custid = new JTextField("ONE");
custid.setPreferredSize(new Dimension(500, 50));
custid.setBackground(Color.CYAN);
customersTable.add(custid);
return customersTable;
}
}
答案 0 :(得分:2)
使用垂直BoxLayout这里是修改后的代码:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
public class Customers
{
public static JFrame frame = new JFrame();
public static void frameGui(JPanel panel, String name)
{
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.setSize(1200, 500);
frame.setVisible(true);
}
public static void ScrollCustomersGui()
{
Box box = Box.createVerticalBox();
//JPanel Table = new JPanel();
//Table.setLayout(new BoxLayout(Table, BoxLayout.Y_AXIS));
box.add(customersTableHeadings());
box.add(customersTableHeadings());
box.add(customersTableHeadings());
JScrollPane scroll = new JScrollPane(box);
JPanel All = new JPanel(new BorderLayout());
All.add(scroll);
frameGui(All, "Customers");
}
public static JPanel customersTableHeadings()
{
// FlowLayout FlowCustTable = (FlowLayout) panel.getLayout();
// FlowCustTable.setHgap(0);
JPanel customersTable = new JPanel();
customersTable.setMaximumSize(new Dimension(550, 60));
JTextField custid = new JTextField("ONE");
custid.setPreferredSize(new Dimension(500, 50));
custid.setBackground(Color.CYAN);
customersTable.add(custid);
return customersTable;
}
public static void main(String[] args)
{
ScrollCustomersGui();
}
}
答案 1 :(得分:1)
你使用的FlowLayout不能用于你的情况你可以使用BoxLayout检查它here,你也可以使用GridBagLayout但它很复杂:)