如何能把字符串中的数字提取出来？

Question

把String转化成char[]数组,逐一取出来对比ascii码值,码值我忘记了,在"0"到"9"的码值之间的,就都是数字

Answer 1

测试：
        String s = "aaa bbb ccc 123 aaa bbb ccc 032123 vvv";
        StringTokenizer st=new StringTokenizer(s);
        while(st.hasMoreTokens()){
            int result=0;
            boolean isDigit=true;
            char[] chs=st.nextToken().toCharArray();
            for(int i=0,len=chs.length;i<len;i++){
                if((Character.isDigit(chs[i]))){
                    result+=Character.digit(chs[i],10)*Math.pow(10,len-i-1);
                }else{
                    isDigit=false;
                    break;
                }
            }
            if(isDigit){
                System.out.println(result);
            }
        }结果：12332123

Answer 2

根据s的规则做自己想要的        String s = "aaa bbb ccc 123.32 aaa bbb ccc 0321.23 vvv";
        StringTokenizer st=new StringTokenizer(s);
        while(st.hasMoreTokens()){
            try {
                float result=Float.parseFloat(st.nextToken());
                System.out.println(result);
            }
            catch (NumberFormatException ex) {
            }
        }