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wanglijunjsj:
谢谢,很有用
java log4j的一些总结 -
lxb_champagne:
this.init(); 类都没初始化好,this没用的。
java final变量的初始化问题 -
lg_asus:
上面代码有点小问题,最新代码:
public class Pr ...
判断素数 -
lg_asus:
测试10 million的以内的数据,算出所有素数时间在500 ...
判断素数 -
lg_asus:
文章中说错了:如果只是找一个数在不在其中,则可以直接遍历一次, ...
40亿不重复的正整数,如何判断一个数是否在其中
文章列表
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
public class JTreeDemo1 implements TreeModelListener{
JLabel label = null;
String nodeName = null;//原有節點名稱
public JTreeDemo1(){
JFrame jf = new JFrame("JTr ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.undo.*;
import javax.swing.text.*;
public class JTextAreaDemo3 extends JFrame implements UndoableEditListener,DocumentListener{
private UndoableEdit edit;
private JTextAre ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.*;
public class JTableDemo7 implements ActionListener{
JTable table = null;
DefaultTableModel defaultModel = null;
JButton button1,button2,butt ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class JTableDemo4 implements ActionListener{
JTable table = null;
JButton button1,button2;
public JTableDemo4(){
JFrame jf = new JFrame();
button1 ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class JTableDemo4 implements ActionListener{
JTable table = null;
JButton button1,button2;
public JTableDemo4(){
JFrame jf = new JFrame();
button1 ...
剛買的一個耳機,拿到辦公室一試,結果麥克風不能用,從網上找了一大堆資料,也沒解決問題。拿到同事的本本上試了下,結果可以用。這說明麥克風是好的。回到自己機上,仔細查了下,發現有兩個選項前面板與后面板(前面板插孔不能用)。把前面板的去掉竟然就可以了。。。
哎。。。原先以為兩個都選上就能多一分保證呢。。。結果費了我半天時間。。。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class JComboBoxDemo3 {
String[] s = {"西瓜","蘋果","草莓","香蕉"};
public JComboBoxDemo3(){
JFrame jf = new JFrame();
Container contentPane = jf.getC ...
JComboBox(ComboModel):可以繼承AbstractListModel和實現ComboBoxModel;重寫getSize() getElementAT() getSelectedItem() 和setSelectedItem()。
當然也可以直接繼承DefaultComboBoxModel,這樣就不需要重寫以上的四個方法了。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class JComboBoxDemo2 ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class JListDemo7 extends MouseAdapter{
JList list = null;
JList list2 = null;
DefaultListModel mode = null;
DefaultListModel mode2= null;
String[] s ={"美國","日本",&qu ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class JListDemo5 {
public JListDemo5(){
String[] s = {"美國","日本","中國","英國","法國"};
JFrame jf = new JFrame();
Container contentPane ...
JLsit(ListModel mode):其中ListModel可以是:
ListModel接口:要重寫addListDataListener() removeListDataListener() getSize() getElementAt()方法
AbstractListModel抽象類:要重寫getSize() getElementAt()方法
DefaultListModel類:不需要重寫任何方法,而且DefaultListModel具有Vector功能,可以addElement() removeElement() getElementAt() cop ...
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.AffineTransform;
import java.util.ArrayList;
import java.util.HashMap;
/**
* A JTabbedPane which has a close ('X') icon on each tab.
* To add a tab, use the method addTab(String, Component)
* To have an ex ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JInternalFrameDemo1 extends JFrame implements ActionListener{
JDesktopPane desktopPane;
int count = 1;
public JInternalFrameDemo1(){
super("JInternalFrameDemo1");
Container contentPane = this. ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JLayeredPaneDemo1 extends JFrame {
public JLayeredPaneDemo1(){
super("JLayeredPaneDemo1");
Integer[] layerConstants = {JLayeredPane.DEFAULT_LAYER,JLayeredPane.PALETTE_LAYER,new Integer(101),
J ...
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
public class MouseDemo4 extends JFrame implements MouseMotionListener,MouseListener{
int startx,starty,endx,endy;
Vector<Rectangle> rectangles = new Vector<Rectangle>();
public MouseDemo4() ...