<分区>
算法
- 开始
- 输入城市名称 - 部分或完整
- 如果用户点击回车，从
JTextField中获取文本 - 开始强力搜索。
- 如果找到匹配项，将它们放入
Vector并将其放入JList - 如果没有找到匹配项，在
Vector中添加一个String“No Match Found” - 向用户显示包含结果的
JWindow - 停止
代码:
package test;
import javax.swing.*;
import java.awt.Dimension;
import java.awt.event.*;
import java.util.Vector;
public class AutoCompleteTest extends JFrame{
JTextField city = new JTextField(10);
String enteredName = null;
String[] cities = {"new jersey","new hampshire",
"sussex","essex","london","delhi","new york"};
JList list = new JList();
JScrollPane pane = new JScrollPane();
ResultWindow r = new ResultWindow();
//------------------------------------------------------------------------------
public static void main(String[] args) {
new AutoCompleteTest();
}
//------------------------------------------------------------------------------
public AutoCompleteTest(){
setLayout(new java.awt.FlowLayout());
setVisible(true);
add(city);
// add(pane);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
city.addKeyListener(new TextHandler());
}
//------------------------------------------------------------------------------
public void initiateSearch(String lookFor){
Vector<String> matches = new Vector<>();
lookFor = lookFor.toLowerCase();
for(String each : cities){
if(each.contains(lookFor)){
matches.add(each);
System.out.println("Match: " + each);
}
}
this.repaint();
if(matches.size()!=0){
list.setListData(matches);
r.searchResult = list;
r.pane = pane;
r.initiateDisplay();
}else{
matches.add("No Match Found");
list.setListData(matches);
r.searchResult = list;
r.pane = pane;
r.initiateDisplay();
}
}
//------------------------------------------------------------------------------
public class ResultWindow extends JWindow{
public JScrollPane pane;
public JList searchResult;
//------------------------------------------------------------------------------
public ResultWindow(){
}
//------------------------------------------------------------------------------
public void initiateDisplay(){
pane.setViewportView(searchResult);
add(pane);
pack();
this.setLocation(AutoCompleteTest.this.getX() + 2,
AutoCompleteTest.this.getY()+
AutoCompleteTest.this.getHeight());
// this.setPreferredSize(city.getPreferredSize());
this.setVisible(true);
}
}
//------------------------------------------------------------------------------
class TextHandler implements KeyListener{
@Override
public void keyTyped(KeyEvent e){
}
@Override
public void keyPressed(KeyEvent e){
if(r.isVisible()){
r.setVisible(false);
}
if(e.getKeyChar() == '\n'){
initiateSearch(city.getText());
}
}
@Override
public void keyReleased(KeyEvent e){
}
}
//------------------------------------------------------------------------------
}
输出
问题
显示结果的 JWindow 的大小(它是 JScrollPane 中的 JList)根据结果而变化 - 如果城市name小，JWindow小，城市名大，JWindow大。
我已经尝试了所有可能的组合。我尝试使用 JWindow、JList 和 JScrollPane 的 setPreferredDimension() 但问题不会解决。
我希望它与装饰的 JFrame 的大小相匹配，无论如何