求一个简单java程序代码，谢谢

求一个简单java程序代码，谢谢

public class TestStar {
public static void main(String[] args) {
String star = "*";
for (int i = 0; i < 5; i++) {
if (i == 0) {
System.out.print(" " + star);
System.out.println();
}
if (i == 1) {
for (int z = 0; z < 4; z++) {
System.out.print(" " + star);
}
System.out.println();
}
if (i == 2) {
System.out.print(" ");
for (int x = 0; x < 3; x++) {
System.out.print(" " + star);
}
System.out.println();
}
if (i == 3) {
for (int y = 0; y < 2; y++) {
System.out.print(" " + star + " ");
}
}
}
}
}

是好使的 但是我没找到画五角星有什么规律（五角星好象不是正规图形吧？）如果还有什么要求的话 补充问题(如果是用*填充所有的东西 不包括 “ ”的话 我可以重新再给你写一个)2008-12-05

刚开始java的时候用记事本编写java源代码，在命令提示符中完成java程序的编译和运行过程，这样是为了更好的理解java基础。
以后可以用Eclipse或其他的开发环境。eclipse有自己的编译器ECJ，会自动进行编译，编写、编译、运行等都可以在一个平台上完成。这样就不用借助cmd手动编译Java程序了。2018-07-27

import java.awt.Dimension;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class Painter extends JFrame{/****/private static final long serialVersionUID = 8160427604782702376L;CanvasPanel canvas = new CanvasPanel();;public Painter() {super("Star");this.add(canvas);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);this.pack();this.setResizable(false);this.setLocationRelativeTo(null);this.setVisible(true);}public static void main(String[] args) {new Painter();}}class CanvasPanel extends JPanel implements ActionListener{/****/private static final long serialVersionUID = -4642528854538741028L;private JButton[] btn = new JButton[4];private String[] btn_name = {"+", "-", "R", "L"};private int center_x = 200, center_y = 200, radius = 100, degree = 0;public CanvasPanel() {this.setPreferredSize(new Dimension(400, 500));this.setLayout(null);for(int i = 0; i < 4; i++) {btn[i] = new JButton(btn_name[i]);btn[i].setBounds(160 + i * 60, 425, 50, 50);btn[i].addActionListener(this);this.add(btn[i]);}}@Overridepublic void paintComponent(Graphics g) {super.paintComponent(g);for(int i = 0; i < 5; i++) {g.drawLine( (int) (center_x + radius * Math.sin(Math.toRadians(degree + 72 * i))),(int) (center_y - radius * Math.cos(Math.toRadians(degree + 72 * i))),(int) (center_x + radius * Math.sin(Math.toRadians(degree + 72 * i + 144))),(int) (center_y - radius * Math.cos(Math.toRadians(degree + 72 * i + 144))));}}public void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif(e.getActionCommand() == "+") {if(radius < 200)radius += 2;repaint();} else if(e.getActionCommand() == "-") {if(radius > 0)radius -= 2;repaint();} else if(e.getActionCommand() == "R") {degree = (degree + 2) % 360;repaint();} else if(e.getActionCommand() == "L") {degree = (degree - 2) % 360;repaint();}}}

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2018-08-24

public class xing{

public static void main(String args[]){
String star = "********";
for(int i=1; i<=5;i++) {
System.out.println(star);
}

}

}

另送给一个，不会可以问我

//打印5行8个星
public class xing1{

public static void main (String args[]){
char star = '*';
//打印5行
for(int z=0;z<5;z++) {
//打印8个*，这一段作为一个整体
for(int i=0;i<8;i++){
System.out.print(star);
}

System.out.println("");
}
}

}2008-12-04

package nihao;
import javax.swing.JOptionPane;
public class world {
public static void main(String[] args) {
JOptionPane.showMessageDialog(
null,
"mly l love you"
);
System.exit(0);
}
}
2018-04-25

applacation 还是applet？2008-12-04