details_3 = new JTextArea(300,700);
details_3.setLineWrap(true);
details_3.setBounds(45, 130, 300, 150);
JScrollPane scrollPane = new JScrollPane(details_3);
getContentPane().add(panel_3, BorderLayout.SOUTH);
getContentPane().add(scrollPane, BorderLayout.CENTER);这边有点混乱,只需要添加scrollPane的,details_3是不用再添加的
而且,已经.add(scrollPane, BorderLayout.CENTER)了details_3不要绝对定位和设置他的大小
details_3.setLineWrap(true);
details_3.setBounds(45, 130, 300, 150);
JScrollPane scrollPane = new JScrollPane(details_3);
getContentPane().add(panel_3, BorderLayout.SOUTH);
getContentPane().add(scrollPane, BorderLayout.CENTER);这边有点混乱,只需要添加scrollPane的,details_3是不用再添加的
而且,已经.add(scrollPane, BorderLayout.CENTER)了details_3不要绝对定位和设置他的大小
{
panel_3 = new JPanel();
GridLayout gridLayout = new GridLayout(10,10);
panel_3.setLayout(gridLayout);
//panel_3.setLayout(null); JLabel label_3 = new JLabel("Retrieve Student");
label_3.setBounds(140, 15, 150, 20);
panel_3.add(label_3); JLabel studentID_3 = new JLabel("Student ID :");
studentID_3.setBounds(40, 40, 150, 20);
panel_3.add(studentID_3); studentID_TF_3 = new JTextField("", 20);
studentID_TF_3.setBounds(160, 40, 180, 20);
panel_3.add(studentID_TF_3); JLabel detail = new JLabel("Student Details :");
detail.setBounds(40, 100, 150, 20);
panel_3.add(detail);
details_3 = new JTextArea();
BorderLayout borderLayout2 = new BorderLayout();
BorderLayout borderLayout3 = new BorderLayout();
JScrollPane scrollPaneTA = new JScrollPane();
String str = "aaa\r\n";
for(int i = 0 ; i < 20 ; i ++)
str += "cc\r\n";
details_3.setText(str);
//panel_3.setLayout(borderLayout3);
details_3.setLineWrap(true);
details_3.setBounds(45, 130, 300, 150);
scrollPaneTA.getViewport().setLayout(borderLayout2);
scrollPaneTA.getViewport().add(details_3, java.awt.BorderLayout.CENTER);
panel_3.add(scrollPaneTA);
JButton retrieveS = new JButton("Retrieve");
retrieveS.setBounds(70, 310, 100, 20);
panel_3.add(retrieveS);
//retrieveS.addActionListener(new ButtonPress2()); JButton clear_3 = new JButton("Clear");
clear_3.setBounds(220, 310, 100, 20);
panel_3.add(clear_3);
clear_3.addActionListener(new ButtonPress()); }
scrollPane.setBounds(...);之后scrollPane.getViewPort().add(JTextArea) ;应该可以现实滚动条的 最近偶也在弄界面
/**
* @author Administrator
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class Test {
private JFrame f = new JFrame();
public void init()
{
f.getContentPane().setLayout(null);
f.setSize(800,600);
f.setVisible(true);
f.show();
JLabel lab = new JLabel("标签1");
lab.setBounds(10,10,200,20);
f.getContentPane().add(lab);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(50,50,300,200);
JTextArea area = new JTextArea();
scrollPane.getViewport().add(area);
f.getContentPane().add(scrollPane);
} public static void main(String[] args) throws Exception
{
Test t = new Test();
t.init();
}
}
在我的机器上okay