我在一个大的panel中用BorderLayout布局，把scrollpane加在east，如下所示
scrollpane初始状态里面是没有表格的，后面有个函数在每次更新表格数据时调用，将表格加进scrollpane
然后界面一生成布局就混乱。。。得把鼠标移来移去才能看到组建出现，还是不完整的出现，后面更新数据也一样。求教。。。
- Java code
private JScrollPane playerScrollPane; public FieldPanel(）{ //panel的构造函数 playerScrollPane=new JScrollPane(); playerScrollPane.setPreferredSize(new Dimension(200, 400)); //大的panel的大小是（800,600） add(playerScrollPane,BorderLayout.EAST); } //......... public void setPlayersTable(Map<LoginMessage, Integer> playersMap){ Set<LoginMessage> playersSet=playersMap.keySet(); Iterator<LoginMessage> iterator=playersSet.iterator(); final Object [][] data =new Object[playersMap.size()][4]; for(int i=0;i<playersMap.size()&&iterator.hasNext();i++){ LoginMessage loginMessage=iterator.next(); data[i][0]="";//头像 data[i][1]=loginMessage.name; data[i][2]=loginMessage.rank; data[i][3]=loginMessage.mark; } TableModel tableModel=new AbstractTableModel() { @Override public Object getValueAt(int rowIndex, int columnIndex) { // TODO Auto-generated method stub return data[rowIndex][columnIndex]; } @Override public int getRowCount() { // TODO Auto-generated method stub return data.length; } @Override public int getColumnCount() { // TODO Auto-generated method stub return 4; } public String getColumnName(int column) {return names[column];} public Class getColumnClass(int c) {return getValueAt(0, c).getClass();} public boolean isCellEditable(int row, int col) {return false;} public void setValueAt(Object aValue, int row, int column) { data[row][column] = aValue; } }; playersTable=new JTable(tableModel); TableRowSorter<TableModel> rowSorter=new TableRowSorter<TableModel>(tableModel); playersTable.setRowSorter(rowSorter); playersTable.setRowHeight(50); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { // TODO Auto-generated method stub 关键就在这里面了，数据是更新了，但布局一片混乱 playerScrollPane.setViewportView(playersTable);// playerScrollPane.validate();// playerScrollPane.repaint(); repaint(); } }); }------解决方案--------------------
其次，不要每次更新数据就建一个新的JTable。
更新你的数据model，然后通知JTable重绘。示例代码如下：
- Java code
import java.awt.BorderLayout;import java.awt.Dimension;import java.util.ArrayList;import java.util.Collections;import java.util.List;import java.util.Map;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.table.AbstractTableModel;public class FieldPanel extends JPanel { private JScrollPane playerScrollPane; private LoginMessageTableModel tableModel; public FieldPanel() { setLayout(new BorderLayout()); tableModel = new LoginMessageTableModel(); playerScrollPane = new JScrollPane(new JTable(tableModel)); playerScrollPane.setPreferredSize(new Dimension(200, 400)); add(playerScrollPane, BorderLayout.EAST); } public void setPlayersTable(Map<LoginMessage, Integer> playersMap) { tableModel.setData(playersMap.keySet()); }}class LoginMessage { Object name, mark, rank;}class LoginMessageTableModel extends AbstractTableModel { private static enum Col { Unknown ("Unknown", Object.class) { @Override Object getData(LoginMessage message) { assert message != null; return ""; } }, Name ("Name", Object.class) { @Override Object getData(LoginMessage message) { assert message != null; return message.name; } }, Rank ("Rank", Object.class) { @Override Object getData(LoginMessage message) { assert message != null; return message.rank; } }, Mark ("Mark", Object.class) { @Override Object getData(LoginMessage message) { assert message != null; return message.mark; } }, ; private final String display; private final Class<?> type; private Col(String display, Class<?> type) { this.display = display; this.type = type; } abstract Object getData(LoginMessage message); } private static final String[] COL_NAMES = new String[] { "Unknown", "Name", "Rank", "Mark" }; private volatile List<LoginMessage> data; LoginMessageTableModel() { data = Collections.emptyList(); } void setData(Iterable<LoginMessage> messages) { List<LoginMessage> list = new ArrayList<LoginMessage>(); for(LoginMessage message : messages) list.add(message); data = list; fireTableDataChanged(); } @Override public int getRowCount() { return data.size(); } @Override public int getColumnCount() { return Col.values().length; } @Override public String getColumnName(int columnIndex) { return Col.values()[columnIndex].display; } @Override public Class<?> getColumnClass(int columnIndex) { return Col.values()[columnIndex].type; } @Override public boolean isCellEditable(int rowIndex, int columnIndex) { return false; } @Override public Object getValueAt(int rowIndex, int columnIndex) { LoginMessage message = data.get(rowIndex); return Col.values()[columnIndex].getData(message); } @Override public void setValueAt(Object aValue, int rowIndex, int columnIndex) {}}