java - 调整 JScrollBar 内 JTable 的大小

Question

有人可以告诉我如何调整 JScrollBar 内的 JTable 的大小吗？

my JTable inside JScrollBar

另外，我有用于注册的JPanel，而JTable是在注册<之后保存记录的验证 JTable 将出现。但是，如果我将大小设置为 JTable 甚至 JScrollPane 的大小，则我的 JTable 中将不会出现任何内容。

这是我的 JTable 的代码:

import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;

public void setColumns(){
        ViewTablePanel.tblModel=new DefaultTableModel();
        ViewTablePanel.tblModel.setColumnIdentifiers(column);
    }

public class ViewTablePanel extends JPanel{
    static JTable tblVoters;
    static DefaultTableModel tblModel;

    ViewTablePanel(){       
        setBorder(BorderFactory.createTitledBorder("Voter's Information Table"));

        data=new Database();
        setColumns();
        data.retrieveRecords();

        ViewTablePanel.tblVoters=new JTable(ViewTablePanel.tblModel);


        add(new JScrollPane(ViewTablePanel.tblVoters));
    }
}

<小时/>

import javax.swing.*;
import javax.swing.table.*;
import java.io.*;
import java.util.*;
public class Database {
    static String [] column={"VOTERS NUMBER", 
        "LAST NAME", "FIRST NAME", 
        "MIDDLE NAME", "GENDER", 
        "STATUS", "WEIGHT", 
        "HEIGHT", "BIRTH MONTH", 
        "BIRTH DAY", "BIRTH YEAR", 
        "BIRTH CITY/MUN.", "BIRTH PROVINCE", 
        "PROVINCE", "CITY/MUN", "BARANGAY", 
        "HOUSE NO./ST.", 
        "# MONTHS IN CITY RESIDENCE", 
        "# YEARS IN CITY RESIDENCE", 
        "# YEARS IN PHIL. RESIDENCE", 
        "OCCUPATION", "TIN NUMBER", 
        "CITIZENSHIP", "CITIZEN SINCE", 
        "FIRST-MOTHER", "MIDDLE-MOTHER", 
        "LAST-MOTHER", "FIRST-FATHER", 
        "MIDDLE-FATHER", "LAST-FATHER"};
    static Vector rows;
    static File fileNew;
    static FileWriter fileWrite;
    static FileReader fileRead;
    static Scanner read;

    public Database() {
        fileNew=new File("Voters.txt");
        fileWrite=null;
        fileRead=null;
        read=null;
    }
    public void retrieveRecords(){
        String holdStr="";
        try {
            fileRead=new FileReader(fileNew);
            read=new Scanner(fileRead);

            while(read.hasNext()){
                holdStr+=read.nextLine()+"\n";
            }
            read.close();

            StringTokenizer strToken=new StringTokenizer(holdStr, "/");

            while(strToken.hasMoreElements()){
                rows=new Vector();
                for(int i=0; i<column.length; i++){
                    rows.add(strToken.nextElement());
                }
                ViewTablePanel.tblModel.addRow(rows);
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

    }
}

这里是我调用要在主JFrame中调用的JTable的地方

import javax.swing.*;
import java.awt.*;

public class ViewPanel extends JPanel{

    ViewPanel(){
        setName("panelView");
        setLayout(new BorderLayout());
        setPreferredSize(new Dimension(880,70));

        add(new JScrollPane(new ViewTablePanel()), BorderLayout.CENTER);
        add(new ViewButtonsPanel(), BorderLayout.SOUTH);
    }
}

请帮忙和任何建议，非常感谢:)

Answer 1

JScrollPane 管理视口(viewport)、可选的垂直和水平滚动条以及可选的行和列标题视口(viewport)。可滚动客户端(如 Jtable)必须放置在 ViewPort View 中，并且您只需调整滚动 Pane 而不是客户端的大小。

检查文档:JScrollPane doc

public class ViewTablePanel extends JPanel{
  static JTable tblVoters;
  static DefaultTableModel tblModel;

  ViewTablePanel(){       
    setBorder(BorderFactory.createTitledBorder("Voter's Information Table"));

    data=new Database();
    setColumns();
    data.retrieveRecords();

    ViewTablePanel.tblVoters=new JTable(ViewTablePanel.tblModel);

    JScrollPane scrollPane = new JScrollPane();
    scrollPane.setBounds(x,y,width,height);
    add(scrollPane);
    scrollPane.setViewportView(ViewTablePanel.tblVoters);
  }
}

希望对你有帮助