Java 如何设置行数？JTable setRowCount GUI 由 Jtextfield 和 JButton
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How to set rowcount? JTable setRowCount GUI by Jtextfield and JButton
提问by Yefta Wahyu Saputra
I tried to create a table and manipulate it. but I do not understand what code should I write in my netbeans.
我试图创建一个表并对其进行操作。但我不明白应该在我的 netbeans 中编写什么代码。
JTextField1 variable n JButton1 Variable ok JTable1 Variable tabel1
JTextField1 变量 n JButton1 变量 ok JTable1 变量 tab1
on JButton1 or Ok Button I give code like this:
在 JButton1 或 Ok Button 上，我提供如下代码：
private void okActionPerformed(java.awt.event.ActionEvent evt) {
int key = Integer.parseInt(n.getText());
c.setText(String.valueOf(key));
DefaultTableModel dtm = (DefaultTableModel) tabel1.getModel();
for(int i = 0; i < key; i++){
int r = tabel1.getRowCount()+1;
dtm.setRowCount(r);
}
}
with code that I write, I managed to make the line corresponds to the number on JTextField1.
使用我编写的代码，我设法使该行与 JTextField1 上的数字相对应。
but when i press the ok button continuously. rows in the table continues to grow.
但是当我连续按下确定按钮时。表中的行继续增长。
how can i make that row in the table according to Jtextfield1 and no longer grow?
如何根据 Jtextfield1 在表中创建该行并且不再增长？
thanks before.
之前谢谢。
采纳答案by Thusitha Thilina Dayaratne
DefaultTableModel dtm = (DefaultTableModel) tabel1.getModel();
dtm.setRowCount(rowcount); // instead you can use your textfiled value here
e.g. dtm.setRowCount(Integer.parseInt((txtFieldName.getText()));
tabel1.setModel(dtm);
回答by Yefta Wahyu Saputra
private void okActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
int key = Integer.parseInt(n.getText());
DefaultTableModel dtm = (DefaultTableModel) tabel1.getModel();
dtm.setRowCount(0);
for(int i = 0; i < key; i++){
int r = tabel1.getRowCount()+1;
dtm.setRowCount(r);
}
}
