我想在我的GUI上使用滚动条。该区域,我希望“可滚动”是没有任何LayoutManager的JPanel,因为内容是静态和动态之间的东西......但也许我的代码的一部分将有所帮助
这是:
pane = getContentPane();
jpane = new JPanel();
// jpane.setBounds(0, 75, 680, 255);
jpane.setLayout(null);
jsp = new JScrollPane(jpane, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
jsp.setBounds(0, 75, 680, 255);
jsp.setPreferredSize(new Dimension(680,255));
pane.add(jsp);
我的JPanel将填充这段代码......
for(int i = 0; i < Integer.parseInt(spaltenzahl.getText()); i++) {
JTextField spaltennamen_feld = new JTextField();
spaltennamen_feld.setBounds(10, 10+35*i, 150, 25);
spaltennamen_arraylist.add(spaltennamen_feld);
JComboBox<String> datentypen_box = new JComboBox<String>(types);
datentypen_box.setBounds(170, 10+35*i, 150, 25);
datentypen_arraylist.add(datentypen_box);
JComboBox<String> datenzusatz_box = new JComboBox<String>(comb);
datenzusatz_box.setBounds(330, 10+35*i, 100, 25);
datenzusatz_arraylist.add(datenzusatz_box);
jpane.add(spaltennamen_feld);
jpane.add(datentypen_box);
jpane.add(datenzusatz_box);
}
问题:我无法添加我的GUI屏幕截图,因为缺少了ehr ...我在这里忘记了这个必需品的名称^ _ ^ 但我真正的问题是:溢出的内容将不会显示在我的JPanel上,而我的ScrollPane不会滚动。有什么想法吗?
非常感谢:)
答案 0 :(得分:2)
您的解决方案不属于上述情况。我想你想要使用JTable,一个有三列,最后两个编辑器是JComboBox。
修改强>
例如:
import java.util.Random;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class Foo2 {
private static void createAndShowGui() {
String[] columns = {"Spaltennamen", " Datentypen", "Datenzusatz"};
String[] dataStrings1 = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" };
String[] dataStrings2 = {"One", "Two", "Three", "Four", "Five"};
Random random = new Random();
DefaultTableModel model = new DefaultTableModel(columns, 0);
int spaltenzahl = 10; // this can change
for (int i = 0; i < spaltenzahl; i++) {
Vector<String> rowData = new Vector<>();
rowData.add("Row Number " + (i + 1));
rowData.add(dataStrings1[random.nextInt(dataStrings1.length)]);
rowData.add(dataStrings2[random.nextInt(dataStrings2.length)]);
model.addRow(rowData);
}
JTable table = new JTable(model);
table.getColumn(columns[1]).setCellEditor(new DefaultCellEditor(new JComboBox<>(dataStrings1)));
table.getColumn(columns[2]).setCellEditor(new DefaultCellEditor(new JComboBox<>(dataStrings2)));
JScrollPane scrollPane = new JScrollPane(table);
JFrame frame = new JFrame("Foo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(scrollPane);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}