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  1.  
  2. import java.awt.Color;
  3. import java.awt.Container;
  4. import java.awt.Dimension;
  5. import java.awt.FlowLayout;
  6. import java.awt.Font;
  7. import javax.swing.JFrame;
  8. import javax.swing.JList;
  9. import javax.swing.JPanel;
  10. import javax.swing.JScrollPane;
  11. import javax.swing.event.ListSelectionEvent;
  12. import javax.swing.event.ListSelectionListener;
  13.  
  14. /*
  15.  * To change this license header, choose License Headers in Project Properties.
  16.  * To change this template file, choose Tools | Templates
  17.  * and open the template in the editor.
  18.  */
  19.  
  20. /**
  21.  *
  22.  * @author ta
  23.  */
  24. public class DemoJcomJlist extends JFrame{
  25.  
  26.      JList<String> jlist ;
  27.     Color [] color = {Color.BLUE,Color.BLACK,Color.DARK_GRAY,Color.PINK,Color.darkGray} ;
  28.     String []  colorname =  { "BLUE" , "BLACK" , "DARK_GRAY" , "PINK" , "DARK_GRAY" };
  29.  
  30.     public DemoJcomJlist(String title) {
  31.         super(title);
  32.         this.setSize(200,250);
  33.        this.getContentPane().setLayout(new FlowLayout());
  34.  
  35.         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  36.         this.setLocationRelativeTo(null);
  37.         this.setVisible(true);
  38.        creatAndShow();
  39.  
  40.     }
  41.  
  42.     public void creatAndShow() {
  43.  
  44.  
  45.         Container con = this.getContentPane();
  46.         JPanel jpn = new JPanel(new FlowLayout());
  47.         jpn.setBackground(Color.red);
  48.  
  49.  
  50.         Font font = new Font("Font.BOLD",20,20);
  51.         jlist = createJlist();
  52.         // KHong hien la cai dimension
  53. //        jlist.setPreferredSize(new Dimension(100,150));
  54.  
  55.         jpn.add(jlist);
  56.         con.add(jpn);
  57.  
  58.  
  59.  
  60.  
  61.  
  62.  
  63.     }
  64.  
  65.  
  66.  
  67.     public JList createJlist()
  68.     {
  69.  
  70.         jlist = new JList<String>(colorname);
  71.         jlist.addListSelectionListener(new ListSelectionListener() {
  72.             @Override
  73.             public void valueChanged(ListSelectionEvent e) {
  74.                 changebackground();
  75.             }
  76.         });
  77.  
  78.         return jlist;
  79.  
  80.     }
  81.  
  82.  
  83.  
  84.     public void changebackground()
  85.     {
  86.         getContentPane().setBackground(color[jlist.getSelectedIndex()]);
  87.  
  88.     }
  89.  
  90.     public static void main(String[] args) {
  91.         new DemoJcomJlist("Color");
  92.  
  93.     }
  94.  
  95.  
  96. }
  97.  
  98. import java.awt.Color;
  99. import java.awt.Container;
  100. import java.awt.Dimension;
  101. import java.awt.FlowLayout;
  102. import java.awt.Font;
  103. import javax.swing.JFrame;
  104. import javax.swing.JList;
  105. import javax.swing.JPanel;
  106. import javax.swing.JScrollPane;
  107. import javax.swing.event.ListSelectionEvent;
  108. import javax.swing.event.ListSelectionListener;
  109.  
  110. /*
  111.  * To change this license header, choose License Headers in Project Properties.
  112.  * To change this template file, choose Tools | Templates
  113.  * and open the template in the editor.
  114.  */
  115.  
  116. /**
  117.  *
  118.  * @author ta
  119.  */
  120. public class DemoJcomJlist extends JFrame{
  121.  
  122.      JList<String> jlist ;
  123.     Color [] color = {Color.BLUE,Color.BLACK,Color.DARK_GRAY,Color.PINK,Color.darkGray} ;
  124.     String []  colorname =  { "BLUE" , "BLACK" , "DARK_GRAY" , "PINK" , "DARK_GRAY" };
  125.  
  126.     public DemoJcomJlist(String title) {
  127.         super(title);
  128.         this.setSize(200,250);
  129.        this.getContentPane().setLayout(new FlowLayout());
  130.  
  131.         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  132.         this.setLocationRelativeTo(null);
  133.         this.setVisible(true);
  134.        creatAndShow();
  135.  
  136.     }
  137.  
  138.     public void creatAndShow() {
  139.  
  140.  
  141.         Container con = this.getContentPane();
  142.         JPanel jpn = new JPanel(new FlowLayout());
  143.         jpn.setBackground(Color.red);
  144.  
  145.  
  146.         Font font = new Font("Font.BOLD",20,20);
  147.         jlist = createJlist();
  148.         // KHong hien la cai dimension
  149. //        jlist.setPreferredSize(new Dimension(100,150));
  150.  
  151.         jpn.add(jlist);
  152.         con.add(jpn);
  153.  
  154.  
  155.  
  156.  
  157.  
  158.  
  159.     }
  160.  
  161.  
  162.  
  163.     public JList createJlist()
  164.     {
  165.  
  166.         jlist = new JList<String>(colorname);
  167.         jlist.addListSelectionListener(new ListSelectionListener() {
  168.             @Override
  169.             public void valueChanged(ListSelectionEvent e) {
  170.                 changebackground();
  171.             }
  172.         });
  173.  
  174.         return jlist;
  175.  
  176.     }
  177.  
  178.  
  179.  
  180.     public void changebackground()
  181.     {
  182.         getContentPane().setBackground(color[jlist.getSelectedIndex()]);
  183.  
  184.     }
  185.  
  186.     public static void main(String[] args) {
  187.         new DemoJcomJlist("Color");
  188.  
  189.     }
  190.  
  191.  
  192. }
  193.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
Main.java:98: error: class, interface, or enum expected
import java.awt.Color;
^
Main.java:99: error: class, interface, or enum expected
import java.awt.Container;
^
Main.java:100: error: class, interface, or enum expected
import java.awt.Dimension;
^
Main.java:101: error: class, interface, or enum expected
import java.awt.FlowLayout;
^
Main.java:102: error: class, interface, or enum expected
import java.awt.Font;
^
Main.java:103: error: class, interface, or enum expected
import javax.swing.JFrame;
^
Main.java:104: error: class, interface, or enum expected
import javax.swing.JList;
^
Main.java:105: error: class, interface, or enum expected
import javax.swing.JPanel;
^
Main.java:106: error: class, interface, or enum expected
import javax.swing.JScrollPane;
^
Main.java:107: error: class, interface, or enum expected
import javax.swing.event.ListSelectionEvent;
^
Main.java:108: error: class, interface, or enum expected
import javax.swing.event.ListSelectionListener;
^
11 errors
stdout 
Standard output is empty
https://ideone.com/NttfuR
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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