比如有个字符串“我上午用了100元。下午用了1000元”
如何输出其中的数字呢，比如a1=100,a2=1000


思路有了用ASC码的大小 但写了半天没成功
请赐教！

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class GetDigit extends JFrame{
    private JTextArea input,output;
    private JButton get,exit;
    private JPanel buttonPanel;
    private Container container;
    public GetDigit(){
        super("获取字符串中的数字");
        container = getContentPane();
        input = new JTextArea(10,40);
        output = new JTextArea(5,40);
        output.setEditable(false);
        container.add(new JScrollPane(input),BorderLayout.NORTH);
        container.add(new JScrollPane(output));
        buttonPanel = new JPanel(new FlowLayout());
        get = new JButton("获取");
        get.addActionListener(new HandleGet());
        exit = new JButton("退出");
        exit.addActionListener(
            new ActionListener(){
                public void actionPerformed(ActionEvent event){
                    System.exit(0);
                }
            }
        );
        buttonPanel.add(get);
        buttonPanel.add(exit);
        container.add(buttonPanel,BorderLayout.SOUTH);
        
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        //使窗口居中
        Dimension frameSize = getSize();
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((screenSize.width - frameSize.width)/2,(screenSize.height - frameSize.height)/2);
        setVisible(true);
    }
    
    public static void main(String args[]){
        GetDigit getDigit = new GetDigit();
    }
    
    
    class HandleGet implements ActionListener{
        public void actionPerformed(ActionEvent event){
            output.setText("");
            char[] inputChars = input.getText().toCharArray();
            int num = 0;  //用来获取字符串中数字的个数
            StringBuffer digit = new StringBuffer("");  //将每次获取的数字串放到这里
            boolean over = true;
            for(int i = 0;i<inputChars.length;i++){
                if(Character.isDigit(inputChars[i]) == true){
                    digit.append(inputChars[i]);
                    over = false;
                }
                else{
                    over = true;
                }
                if((over==true && digit.length()!=0) || (digit.length()!=0 && i == inputChars.length-1)){
                    num++;
                    output.append("第" +  num + "次出现的数字为：    " + digit + "\n");
                    digit = new StringBuffer("");
                }
            }
        }
    }
}

[[it] 本帖最后由 freish 于 2008-6-12 22:39 编辑 [/it]]

谢谢你哦！不过还是要恬不知耻的追毛求疵下

无法处理小数哦。并且 怎么对结果进行求和等操作呢 ？
不过还是很谢谢你 ，我自己再改改！

[[it] 本帖最后由 st163163 于 2008-6-13 14:14 编辑 [/it]]