这是这个问题的延续Java resizing individual components of JPanel这次框架只有一个表格和下面的一个 JTextArea。在表和 JTextArea 之间可以看到一个大的空白区域。这是 myPanel.java:
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
public class myPanel extends JPanel {
public myPanel() { // Creating a vertical Box layout with five sections, placing jpanels there
//First panel with a table
String[] columnNames = {"First", "Second", "Third", "Fourth"};
Object[][] data = {{"11", "12", "13", "Forteen"},{"21", "22", "23", "Twenty four"}};
JScrollPane scrollPane1 = new JScrollPane(new JTable(data, columnNames));
//Second panel with a text area
JTextArea ecnArea = new JTextArea(10, 20);
ecnArea.setText("");
ecnArea.setName("Note");
//ecnArea.setLineWrap(true);
//ecnArea.setWrapStyleWord(true);
JScrollPane myScrollBar = new JScrollPane(ecnArea);
//Placing everything in a container
this.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.anchor =GridBagConstraints.CENTER;
c.fill = GridBagConstraints.BOTH;
c.weightx = 0.5;
c.weighty=0.5;
c.gridx = 0;
c.gridy = 0;
this.add(scrollPane1, c);
c.gridy++;
this.add(myScrollBar, c);
}
}
为什么会出现?如何删除它?
最佳答案
您应该添加这些行:
JTable table = new JTable(data, columns);
table.setPreferredScrollableViewportSize(new Dimension(500,60));
JScrollPane scrollPanel = new JScrollPane(table);
//scrollPanel.getViewport().setBackground(color.WHITE; //optional, but looks nicer
您还需要导入尺寸和颜色。
关于java - JTable 政策。表格下方的 gridBagLayout 面板上的空白空间。,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37347912/