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代码如下：import javax.microedition.lcdui.Canvas;import javax.microedition.lcdui.Display;import javax.microedition.lcdui.Graphics;import javax.microedition.midlet.MIDlet;import javax.microedition.midlet.MIDletStateChangeException;public class Zfx extends MIDlet { private Display display; public Zfx() { display=Display.getDisplay(this); Zfxc qs=new Zfxc(); display.setCurrent(qs); } protected void destroyApp(boolean arg0) throws MIDletStateChangeException { } protected void pauseApp() { } protected void startApp() throws MIDletStateChangeException { }}class Zfxc extends Canvas implements Runnable{ private int x,y,x1,y1,i; private boolean flag; Zfxc(){ init(); } private void init(){ Thread thread=new Thread(this); thread.start(); } protected void paint(Graphics g) { g.setColor(255,255,255); g.fillRect(0, 0, this.getWidth(), this.getHeight()); g.setColor(0); g.fillRect(x, y, 10, 10); } private void logic(){ if(x=this.getWidth()-10){ x1=2; } if(x1==1){ x+=3; }else if(x1==2){ x-=3; } if(y=this.getHeight()-10){ y1=2; } if(y1==1){ y+=3; }else if(y1==2){ y-=3; } } protected void keyPressed(int keyCode) { if(keyCode==-5){ if(i==0){ flag=true; i=1; }else if(i==1){ flag=false; i=0; } } } public void run() { while(true){ if(flag){ logic(); } repaint(); try { Thread.sleep(80); } catch (InterruptedException e) { e.printStackTrace(); } } }}求Java 实现绘制图形并移动代码
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public class Test013 {
/**
* 编写一个图形类MyGraphic。 1）它有两个基本属性：图形线条的颜色String lineColor和图形的填充颜色String
* fillColor。 2）设计矩形类CRectangle，有属性double rLong和宽double rWidth， 使用方法 float
* calCircum()可以返回矩形的周长，使用方法float calSquare()可以返回矩形的面积。
* 编写方法show()，显示图形的线条颜色和填充颜色，输出面积和方法。 3）设计圆形类CCircle,定义属性：半径double
* radius，可以通过同名方法计算周长和面积。 编写方法show()，显示图形的线条颜色和填充颜色，输出面积和方法。
* 4）编写出应用程序对CRectangle类和CCircle类进行验证。 完成上述要求即可
*/
public static void main(String[] args) {
MyGraphic rectangle = new CRectangle(10, 5);
rectangle.setFillColor("紫色"); //设定矩形填充颜色
rectangle.setLineColor("白色"); //设定矩形线条颜色
rectangle.show();
System.out.println("矩形周长 = " + rectangle.calCircum());
System.out.println("矩形面积 = " + rectangle.calSquare());
MyGraphic circle = new CCircle(3);
circle.setFillColor("红色");
circle.setLineColor("黄色");
circle.show();
System.out.println("园形周长 = " + circle.calCircum());
System.out.println("园形面积 = " + circle.calSquare());
}
}
/**
* 图形类
*
*/
abstract class MyGraphic {
private String lineColor; // 图形线条的颜色
private String fillColor; // 图形的填充颜色
public String getLineColor() {
return lineColor;
}
public void setLineColor(String lineColor) {
this.lineColor = lineColor;
}
public String getFillColor() {
return fillColor;
}
public void setFillColor(String fillColor) {
this.fillColor = fillColor;
}
public MyGraphic(String lineColor, String fillColor) {
this.lineColor = lineColor;
this.fillColor = fillColor;
}
public MyGraphic() {
}
/**
* 显示图形的颜色
*/
public abstract void show();
/**
* 计算图形的周长
*/
public abstract float calCircum();
/**
* 计算图形的面积
*/
public abstract float calSquare();
}
/**
* 矩形类
*
*/
class CRectangle extends MyGraphic {
private double rLong; // 长
private double rWidth; // 宽
/**
* 通过构造函数为图形的属性赋值
*
* @param rLong
* @param rWidth
*/
public CRectangle(double rLong, double rWidth) {
this.rLong = rLong;
this.rWidth = rWidth;
}
/**
* @return 矩形的周长
*/
@Override
public float calCircum() {
return (float) (2 * (rLong + rWidth));
}
/**
* @return 矩形的面积
*/
@Override
public float calSquare() {
return (float) (rLong * rWidth);
}
@Override
public void show() {
System.out.println("矩形线条的颜色: " + super.getLineColor());
System.out.println("矩形填充颜色: " + super.getFillColor());
}
public double getrLong() {
return rLong;
}
public void setrLong(double rLong) {
this.rLong = rLong;
}
public double getrWidth() {
return rWidth;
}
public void setrWidth(double rWidth) {
this.rWidth = rWidth;
}
}
/**
* 圆形类
*
*/
class CCircle extends MyGraphic {
private double radius; // 圆形半径
public CCircle(double radius) {
this.radius = radius;
}
/**
* @return 圆形的周长
*/
@Override
public float calCircum() {
return (float) (2 * Math.PI * radius);
}
/**
* @return 圆形的面积
*/
@Override
public float calSquare() {
return (float) (Math.PI * radius * radius);
}
@Override
public void show() {
System.out.println("圆形线条的颜色: " + super.getLineColor());
System.out.println("圆形填充颜色: " + super.getFillColor());
}
public double getRadius() {
return radius;
}
public void setRadius(double radius) {
this.radius = radius;
}
}
package hao;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.io.File;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
public class ChatPanel extends JPanel {
private static final long serialVersionUID = 1L;
JButton send,record,saveRecord,image;
JTextArea inputArea;
JTextPane text;//注意用法****************************************************************************
JComboBox fontName = null, fontSize = null, fontStyle = null, fontColor = null,fontBackColor = null;
public StyledDocument doc = null; JScrollPane scrollPane;JPanel textChat;
JButton music;
public ChatPanel() {
setLayout(new BorderLayout());
text = new JTextPane();
text.setEditable(false);
doc = text.getStyledDocument();//跟踪文本和图片写到该区域的位置*************************************
scrollPane = new JScrollPane(text);
//注意下面对JComboBox的巧用***********************************************************************
String[] str_name = { "宋体", "黑体", "Dialog", "Gulim" };
String[] str_Size = { "12", "14", "18", "22", "30", "40" };
String[] str_Style = { "常规", "斜体", "粗体", "粗斜体" };
String[] str_Color = { "黑色", "红色", "蓝色", "黄色", "绿色" };
String[] str_BackColor = { "无色", "灰色", "淡红", "淡蓝", "淡黄", "淡绿" };
fontName = new JComboBox(str_name);
fontSize = new JComboBox(str_Size);
fontStyle = new JComboBox(str_Style);
fontColor = new JComboBox(str_Color);
fontBackColor = new JComboBox(str_BackColor);
fontName.setBackground(new Color(255,153,255));
fontSize.setBackground(new Color(255,153,255));
fontStyle.setBackground(new Color(255,153,255));
fontColor.setBackground(new Color(255,153,255));
fontBackColor.setBackground(new Color(255,153,255));
Box box = Box.createVerticalBox();//创建一个可以容纳多个Box组件的Box*******************************
Box box_1 = Box.createHorizontalBox();
Box box_2 = Box.createHorizontalBox();
Box box_4 = Box.createHorizontalBox();
box.add(box_1);
box.add(box_2);
box.add(box_4);
JLabel b1= new JLabel("字体~~"), b2 = new JLabel("样式~~"),b3 = new JLabel("字号~~"),b4 = new JLabel("颜色~~"),b5 = new JLabel("背景~~");
b1.setBackground(new Color(255,153,255));
b2.setBackground(new Color(255,153,255));
b3.setBackground(new Color(255,153,255));
b4.setBackground(new Color(255,153,255));
b5.setBackground(new Color(255,153,255));
box_1.add(b1);
box_1.add(fontName);
box_1.add(Box.createHorizontalStrut(8));
box_1.add(b2);
box_1.add(fontStyle);
box_1.add(Box.createHorizontalStrut(8));
box_1.add(b3);
box_1.add(fontSize);
box_2.add(Box.createHorizontalStrut(8));
box_2.add(b4);
box_2.add(fontColor);
box_2.add(Box.createHorizontalStrut(8));
box_4.add(b5);
box_4.add(fontBackColor);
textChat = new JPanel();
textChat.setLayout(new BorderLayout());
textChat.setBackground(new Color(255,153,255));
inputArea = new JTextArea(3, 20);
inputArea.setLineWrap(true); //设置文本区的换行策略。88888*********************************
send = new JButton("发送");
record=new JButton("显示记录");
saveRecord=new JButton("储存记录");
image=new JButton("表情");
send.setBackground(new Color(255,153,255));
record.setBackground(new Color(255,153,255));
saveRecord.setBackground(new Color(255,153,255));
image.setBackground(new Color(255,153,255));
Box box_3 = Box.createHorizontalBox();
box_3.add(send); box_3.add(Box.createHorizontalStrut(8));//设置按钮间距*************************888
box_3.add(record); box_3.add(Box.createHorizontalStrut(8)); //设置按钮间距*************************888
box_3.add(saveRecord); box_3.add(Box.createHorizontalStrut(8));//设置按钮间距*************************888
box_3.add(image);
box.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5));//设置Box的边框线********************
box_3.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5));
textChat.add(box,BorderLayout.NORTH);
textChat.add(inputArea,BorderLayout.CENTER);
textChat.add(box_3, BorderLayout.SOUTH);
inputArea.requestFocus(true);
inputArea.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),5));//设置输入窗口边框线*******************
text.setBorder(BorderFactory.createLineBorder(new Color(102,102,0),8));//设置输入窗口边框线*******************
JPanel audioPanel = new JPanel();//最上面的边框************************************************************************
audioPanel.setBackground(new Color(255,153,255));
audioPanel.setLayout(new GridLayout(1,1));
music = new JButton("想听就听");
music.setPreferredSize(new Dimension(320,50));
music.setBorder(BorderFactory.createLineBorder(Color.BLACK,10));//设置输入窗口边框线*******************
audioPanel.add(music);
add(audioPanel, BorderLayout.NORTH);
add(scrollPane,BorderLayout.CENTER);
add(textChat, BorderLayout.SOUTH);
}
void insertIcon(ImageIcon image) {
text.setCaretPosition(doc.getLength());
text.insertIcon(image);
insert(new MessageStyle());//?????????????????????????????????????????????????????????????????????????????/
}
public void insert(MessageStyle attrib) {
try {
doc.insertString(doc.getLength(), attrib.getText() + "\n", attrib.getAttrSet());//写完后接着换行************
} catch (BadLocationException e) {
e.printStackTrace();
}
}
public MessageStyle getMessageStyle(String line) {
MessageStyle att = new MessageStyle();
att.setText(line);
att.setName((String) fontName.getSelectedItem());
att.setSize(Integer.parseInt((String) fontSize.getSelectedItem()));
String temp_style = (String) fontStyle.getSelectedItem();
if (temp_style.equals("常规")) {
att.setStyle(MessageStyle.GENERAL);
}
else if (temp_style.equals("粗体")) {
att.setStyle(MessageStyle.BOLD);
}
else if (temp_style.equals("斜体")) {
att.setStyle(MessageStyle.ITALIC);
}
else if (temp_style.equals("粗斜体")) {
att.setStyle(MessageStyle.BOLD_ITALIC);
}
String temp_color = (String) fontColor.getSelectedItem();
if (temp_color.equals("黑色")) {
att.setColor(new Color(0, 0, 0));
}
else if (temp_color.equals("红色")) {
att.setColor(new Color(255, 0, 0));
}
else if (temp_color.equals("蓝色")) {
att.setColor(new Color(0, 0, 255));
}
else if (temp_color.equals("黄色")) {
att.setColor(new Color(255, 255, 0));
}
else if (temp_color.equals("绿色")) {
att.setColor(new Color(0, 255, 0));
}
String temp_backColor = (String) fontBackColor.getSelectedItem();
if (!temp_backColor.equals("无色")) {
if (temp_backColor.equals("灰色")) {
att.setBackColor(new Color(200, 200, 200));
}
else if (temp_backColor.equals("淡红")) {
att.setBackColor(new Color(255, 200, 200));
}
else if (temp_backColor.equals("淡蓝")) {
att.setBackColor(new Color(200, 200, 255));
}
else if (temp_backColor.equals("淡黄")) {
att.setBackColor(new Color(255, 255, 200));
}
else if (temp_backColor.equals("淡绿")) {
att.setBackColor(new Color(200, 255, 200));
}
}
return att;
}
}
您好，您这样：
public class search {
public int counter(String inputs, String word) {
int counter = 0;
for (int i = 0; i inputs.length(); i++) {
if(word.equals(inputs.charAt(i)+"")){
counter++;
}
}
return counter;
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("请输入一个字符串:");
String str = sc.next();
System.out.print("请输入要查找的字符:");
String s = sc.next();
search sear = new search();
int c = sear.counter(str, s);
System.out.println("\"" + str + "\"中包含" + c + "个\"爱\"");
}
}