Java 使用setValueAt&x27刷新/更新JTable;我不能正常工作
我正在为我的学院做一个项目,我需要两个JFrame。第一个是主菜单,第二个在按下JButton(Run)时可见。 我需要在两个JFrame中都绘制一个内存,所以我使用JTable来显示内存 内存类为:Java 使用setValueAt&x27刷新/更新JTable;我不能正常工作,java,swing,jtable,Java,Swing,Jtable,我正在为我的学院做一个项目,我需要两个JFrame。第一个是主菜单,第二个在按下JButton(Run)时可见。 我需要在两个JFrame中都绘制一个内存,所以我使用JTable来显示内存 内存类为: public class Memory extends JPanel{ private JPanel panel; private JTable table; private String[] array; private JScrollPane scr
public class Memory extends JPanel{
private JPanel panel;
private JTable table;
private String[] array;
private JScrollPane scrollpane;
public Memory()
{
array = new String[256]
this.addMemoryGUI();
}
public final JPanel addMemoryGUI()
{
this.panel = new JPanel();
this.panel.setPreferredSize(new Dimension(315,490));
this.panel.setLayout(null);
this.add(panel);
String info[][] = new String[256][2];
for(int j=0;j<256;j++)
{
info[j][0] = j;
info[j][1] = null;
}
String[] title = new String[]{"Address","Value"};
DefaultTableModel model = new DefaultTableModel(info,title);
table = new JTable(model){
@Override
public boolean isCellEditable(int rowIndex, int colIndex) {
return false;
}
};
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment( JLabel.CENTER );
table.getColumnModel().getColumn(0).setCellRenderer( centerRenderer );
table.getColumnModel().getColumn(1).setCellRenderer( centerRenderer );
JTableHeader header = table.getTableHeader();
header.setBackground(Color.GRAY);
this.scrollpane = new JScrollPane(this.table);
this.scrollpane.setBounds(0, 0,315, 490);
this.panel.add(this.scrollpane);
return panel;
}
public void setAddrValue(int addr,String value)
{
Memory.this.array[addr] = value;
this.table.setValueAt(value,addr , 1);
}
public String getAddrValue(int addr)
{
return Memory.this.array[addr];
}
public String[] getMemory()
{
return Memory.this.array;
}
public void deleteValue(int i)
{
array[i]=null;
this.table.setValueAt(null, i, 1);
}
}
}
}
在这段代码中,setValueAt()方法工作得很好,没有任何问题。
但当我在第二个JFrame中使用相同的JTabel代码时,当我按下run JButton,但创建新的JTable而不是内存类中的JTable,并使用setValueAt()向JTable插入值时,JTabel不会更新
第二帧的代码:
public class ExecutionGUI extends JFrame {
private JTextField field1;
private JTextField field2;
private JButton button1;
private JScrollPane scrollpane;
private JButton button2;
private Memory mem;
private JTable table;
private static DefaultTableModel model;
private String info[][];
private String[] title;
private Memory mem;
public ExecutionGUI(Memory mem)
{
this.mem = mem;
this.GraphicComponents();
}
public final void GraphicComponents()
{
this.setTitle("Run");
this.setBounds(200, 100, 800, 600);
this.setLayout(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setResizable(false);
this.info = new String[256][2];
for(int j=0;j<256;j++)
{
info[j][0] = j;
if(mem.getAddrValue(j)==null)
{
}
else
{
info[j][1] = mem.getAddrValue(j);
}
}
title = new String[]{"Address","Value"};
model = new DefaultTableModel(info,title);
table = new JTable(model){
@Override
public boolean isCellEditable(int rowIndex, int colIndex) {
return false;
}
};
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment( JLabel.CENTER );
table1.getColumnModel().getColumn(0).setCellRenderer( centerRenderer );
table1.getColumnModel().getColumn(1).setCellRenderer( centerRenderer );
JTableHeader header = table.getTableHeader();
header.setBackground(Color.GRAY);
this.scrollpane = new JScrollPane(table);
this.scrollpane.setBounds(610, 30,170, 470);
this.add(this.scrollpane);
this.field1=new JTextField();
this.field1.setBounds(10,50,70,20);
this.add(field1);
this.field2=new JTextField();
this.field2.setBounds(90,50,70,20);
this.add(field2);
this.button1=new JButton("Write Value");
this.button1.setBounds(170,50,130,20);
this.button1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e)
{
table.setValueAt(MainGUI.this.field2.getText().toString(),MainGUI.this.field1.getText().toString(),1 );
}
});
this.add(button1);
}
公共类ExecutionGUI扩展了JFrame{
私有JTextField字段1;
私有JTextField字段2;
私人按钮1;
私有JScrollPane滚动窗格;
私人按钮2;
专用存储器;
专用JTable表;
私有静态模型;
私有字符串信息[];
私有字符串[]标题;
专用存储器;
公共执行GUI(内存内存内存)
{
this.mem=mem;
这是graphicscomponents();
}
公共最终组件()
{
本条。设定标题(“运行”);
这个.挫折(200100800600);
此.setLayout(null);
此.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
此参数为.setresizeable(false);
this.info=新字符串[256][2];
对于(int j=0;jDon)来说,不要使用空布局和setBounds()。Swing设计用于布局管理器以实现适当的功能。好的,我同意,但我认为我的问题不在这里。因此我稍后会在代码中使用它。table.setValueAt(MainGUI.this.field2.getText().toString(),MainGUI.this.field1.getText().toString(),1);
jtablesetValueAt(Object value,int row,int column)
+1@camickr。另请参见类似的问题/答案请学习java命名约定并遵守它们。
public class ExecutionGUI extends JFrame {
private JTextField field1;
private JTextField field2;
private JButton button1;
private JScrollPane scrollpane;
private JButton button2;
private Memory mem;
private JTable table;
private static DefaultTableModel model;
private String info[][];
private String[] title;
private Memory mem;
public ExecutionGUI(Memory mem)
{
this.mem = mem;
this.GraphicComponents();
}
public final void GraphicComponents()
{
this.setTitle("Run");
this.setBounds(200, 100, 800, 600);
this.setLayout(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setResizable(false);
this.info = new String[256][2];
for(int j=0;j<256;j++)
{
info[j][0] = j;
if(mem.getAddrValue(j)==null)
{
}
else
{
info[j][1] = mem.getAddrValue(j);
}
}
title = new String[]{"Address","Value"};
model = new DefaultTableModel(info,title);
table = new JTable(model){
@Override
public boolean isCellEditable(int rowIndex, int colIndex) {
return false;
}
};
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment( JLabel.CENTER );
table1.getColumnModel().getColumn(0).setCellRenderer( centerRenderer );
table1.getColumnModel().getColumn(1).setCellRenderer( centerRenderer );
JTableHeader header = table.getTableHeader();
header.setBackground(Color.GRAY);
this.scrollpane = new JScrollPane(table);
this.scrollpane.setBounds(610, 30,170, 470);
this.add(this.scrollpane);
this.field1=new JTextField();
this.field1.setBounds(10,50,70,20);
this.add(field1);
this.field2=new JTextField();
this.field2.setBounds(90,50,70,20);
this.add(field2);
this.button1=new JButton("Write Value");
this.button1.setBounds(170,50,130,20);
this.button1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e)
{
table.setValueAt(MainGUI.this.field2.getText().toString(),MainGUI.this.field1.getText().toString(),1 );
}
});
this.add(button1);
}