问答题

编写一个方法hex3704()，要求将一个十进制正整数n转换成十六进制数，其中n为方法参数，十六进制数以字符串(如有字母用大写)的形式返回。

【参考答案】

String hex3704(int n)
{
int c[]=new int[8];
i......

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阅读下列程序，写出程序功能。import java.applet.*;import java.awt.*;import java.awt.event.*;public class Class36004 extends Applet implements KeyListener{int count=0;TextArea text=new TextArea(5,20);public void init(){add(text);text.addKeyListener(this);}public void keyPressed(KeyEvent e){int t=e.getKeyCode();if(t＞=KeyEvent.VK_0 && t＜=KeyEvent.VK_9){text.appeqd( * );count ++;if(count%10==0)text.append( n );}elsetext.setEditable(false);public void keyTyped(KeyEvent e){}public void keyReleased(KeyEvent e){}}
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阅读下列程序，写出程序功能。import java.applet.*;import java.awt.*;import java.awt.event.*;public class Class35004 extends Applet implements MouseListener{int r=-10,mouseFlag=0;static String mouseState[]={ AAA , BBB , CCC , DDD };public void print(int x,int y){Graphics g=getGraphics();r+=10;g.drawString(mouseState[mouseFlag]+ ,x= +x+ ,y= +y+ n ,10,r);}public void mousePressed(MouseEvent e){mouseFlag=0;print(e.getX(),e.getY());}public void mouseReleased(MouseEvent e){mouseFlag=1;print(e.getX(),e.getY());}public void mouseEntered(MouseEvent e){mouseFlag=2;print(e.getX(),e.getY());}public void mouseExited(MouseEvent e){mouseFlag=3;print(e.getX(),e.getY());}public void mouseClicked(MouseEvent e){}public void init(){setBackground(Color.red);addMouseListener(this);}}
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