这使用GridBagLayout进行所需的操作。您可能会使用组件的setMinimumSize和setPreferedSize。
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
public class TestFrame extends JFrame {
private static final long serialVersionUID = 1L;
public TestFrame() {
super("Top Frame");
setDefaultCloSEOperation(EXIT_ON_CLOSE);
JPanel panel = new JPanel(new GridBagLayout());
JTree env = getEnvironmentTree();
env.expandRow(0);
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.BOTH;
c.weightx=.7;
c.weighty=1;
c.gridx=0;
c.gridy=0;
c.gridheight=1;
c.gridwidth=7;
panel.add(new JScrollPane(env),c);
c.weightx=.3;
c.gridx=7;
c.gridy=0;
c.gridheight=1;
c.gridwidth=GridBagConstraints.REMAINDER;
panel.add(new JTextArea("Some contents"),c);
add(panel);
setSize(800, 600);
setLocationRelativeTo(null);
setVisible(true);
}
private JTree getEnvironmentTree() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
JTree tree = new JTree(root);
DefaultMutableTreeNode one = new DefaultMutableTreeNode("One");
root.add(one);
one.add(new DefaultMutableTreeNode("under one.1"));
one.add(new DefaultMutableTreeNode("under one.2"));
root.add(new DefaultMutableTreeNode("two"));
root.add(new DefaultMutableTreeNode("three"));
return tree;
}
public static void main(String[] args) {
new TestFrame();
}
}
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