求助!

在JAVA中,给定一个正整数 m ,判断它的具体位数,分别打印没一位数,再按照逆序打印出各位数.
例如这里的 m=24863.这个程序怎么写啊???
----------------解决方案--------------------------------------------------------
怎么还没反映呢?
----------------解决方案--------------------------------------------------------
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import   javax.swing.text.AttributeSet;   
import   javax.swing.text.BadLocationException;   
import   javax.swing.text.PlainDocument;

public class NumAna extends JFrame{
    private Container container;
    private JTextField input;
    private JTextArea output;
    private JLabel inputLabel;
    private JButton button,closeButton;
    
    public NumAna(){
        super("数字判断");
        
        container = getContentPane();
        
        input = new JTextField("",15);
        inputLabel = new JLabel("请输入数字");
        input.setDocument(new customDoc());
        output = new JTextArea(20,30);
        output.setEditable(false);
        
        button = new JButton("分析");
        button.addActionListener(
            new ActionListener(){
                public void actionPerformed(ActionEvent event){    
                        String num = input.getText();
                        if(num.length()==0)
                            output.setText("您没有输入数字。");
                        else{
                            output.append("您输入的是："+input.getText()+"，是"+num.length()+"位数.\n");
                            for(int i=0;i<num.length();i++)
                                output.append("第"+(i+1)+"位数是："+num.charAt(i)+"\n");
                            output.append("\n");
                            StringBuffer buf = new StringBuffer(num);
                            buf.reverse();
                            output.append("逆序后为"+buf.toString()+"\n");
                            input.setText("");
                            for(int i = 0;i<buf.toString().length();i++)
                                output.append("第"+(i+1)+"位数是："+buf.toString().charAt(i)+"\n");
                        }
                        input.grabFocus();
                }
            }
        );
        closeButton = new JButton("关闭");
        closeButton.addActionListener(
            new ActionListener(){
                public void actionPerformed(ActionEvent event){
                    System.exit(0);
                }
            }
        );
        JPanel panel1 = new JPanel();
        panel1.setLayout(new FlowLayout());
        panel1.add(inputLabel);
        panel1.add(input);
        container.add(new JScrollPane(output));
        JPanel panel2 = new JPanel();
        panel2.setLayout(new FlowLayout());
        panel2.add(closeButton);
        panel2.add(button);
        container.add(panel1,BorderLayout.NORTH);
        container.add(panel2,BorderLayout.SOUTH);
        
        pack();
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension screenSize = kit.getScreenSize();
        int screenHeight = screenSize.height;
        int screenWidth = screenSize.width;
        setLocation((screenWidth - 800) / 2, (screenHeight - 110) / 2);
        
        setVisible(true);
        setResizable(false);
    }
    
    public static void main(String args[]){
        NumAna num = new NumAna();
        num.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}


    class   customDoc   extends   PlainDocument{        
        public   void   insertString(int   offs,   String   str,   AttributeSet   a)     
            throws   BadLocationException   {   
                for(int i=0;i<str.length();i++){  
                    if(str.charAt(i)<'0'||str.charAt(i)>'9'){   
                        return;   
                    }
                }   
            super.insertString(offs,str,a);  
            
          }   
          }

[[it] 本帖最后由 freish 于 2008-4-3 09:03 编辑 [/it]]

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• xishuiwuqing +3 我很赞同 2008-4-3 10:36