如何画一个点? java里如何画一个点 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 //我的部分代码import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JPanel;import java.awt.Color;import java.awt.Font;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.Graphics;import java.awt.Graphics2D;import java.util.Random;import java.applet.Applet;public class Graph {/* public void init(){ Draw Dpanel=new Draw(); Dpanel.setBackground(Color.white); }*/ public static void main(String[] args) { JFrame GraphWin=new JFrame("计算机科学与技术"); GraphWin.setSize(600,480); GraphWin.setLocation(100,100); JMenuBar Bar = new JMenuBar(); JMenu[] Menu=new JMenu[5]; Menu[0]=new JMenu("画点"); Menu[1]=new JMenu("直线"); Menu[2]=new JMenu("矩形"); Menu[3]=new JMenu("圆行"); Menu[4]=new JMenu("椭圆"); Bar.setBackground(Color.LIGHT_GRAY); for(int i=0;i<5;i++){ Bar.add(Menu[i]); Menu[i].setFont(new Font("宋体",0,12)); } GraphWin.setJMenuBar(Bar); GraphWin.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); Draw Dpanel=new Draw(); Dpanel.setBackground(Color.white); GraphWin.getContentPane().add(Dpanel); GraphWin.setVisible(true); }}class Draw extends JPanel{ int x; int y; Draw(){ setBackground(Color.white); }} 画一个半径为1的圆就行了:import java.awt.Container;import java.awt.Dimension;import java.awt.Graphics;import java.awt.GridLayout;import javax.swing.*;public class TestGUI extends JFrame { public TestGUI() { this.setBounds(300, 300, 300, 300); Container c = this.getContentPane(); c.add(new MyPanel()); this.setVisible(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub new TestGUI(); } private class MyPanel extends JPanel { public void paint(Graphics g) { g.drawOval(100, 100, 1, 1); } }} 驱动写错了,Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");String url="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=sample";Connection con=DriverManager.getConnection(url,"sa","password");如果你用的数据源 那么String url="jdbc:odbc:sample";Connection con=DriverManager.getConnection(url,"sa","password"); jdbc数据库连接池问题 一道简单的java算法题 你用JAVA做什么项目?还用到哪些技术?大家来谈谈 如何将字符串放进字节数组里? Hashtable和Hashset有啥区别 我的jdk里面怎么少个东西? 刚刚开始学JAVA,一个小问题,请大家帮忙看一下! 请问在 JDK 中用哪个类对 String 进行 Base64编码? 这个题目好象编译有错啊>??再线等 如何得到当前JAVA程序运行时间? 用socket接受的文件不能删除~求助 java连接SQLServer 2000数据库出现这样的错误,应如何配置和修正?
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.util.Random;
import java.applet.Applet;
public class Graph {/* public void init(){
Draw Dpanel=new Draw();
Dpanel.setBackground(Color.white);
}
*/
public static void main(String[] args) {
JFrame GraphWin=new JFrame("计算机科学与技术");
GraphWin.setSize(600,480);
GraphWin.setLocation(100,100);
JMenuBar Bar = new JMenuBar();
JMenu[] Menu=new JMenu[5];
Menu[0]=new JMenu("画点");
Menu[1]=new JMenu("直线");
Menu[2]=new JMenu("矩形");
Menu[3]=new JMenu("圆行");
Menu[4]=new JMenu("椭圆");
Bar.setBackground(Color.LIGHT_GRAY);
for(int i=0;i<5;i++){
Bar.add(Menu[i]);
Menu[i].setFont(new Font("宋体",0,12));
} GraphWin.setJMenuBar(Bar);
GraphWin.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Draw Dpanel=new Draw();
Dpanel.setBackground(Color.white);
GraphWin.getContentPane().add(Dpanel);
GraphWin.setVisible(true);
}}class Draw extends JPanel{
int x;
int y;
Draw(){
setBackground(Color.white);
}
}
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;import javax.swing.*;public class TestGUI extends JFrame {
public TestGUI() {
this.setBounds(300, 300, 300, 300);
Container c = this.getContentPane(); c.add(new MyPanel());
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new TestGUI();
} private class MyPanel extends JPanel {
public void paint(Graphics g) {
g.drawOval(100, 100, 1, 1);
}
}
}
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
String url="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=sample";
Connection con=DriverManager.getConnection(url,"sa","password");如果你用的数据源 那么
String url="jdbc:odbc:sample";
Connection con=DriverManager.getConnection(url,"sa","password");