java 正则表达式问题，弄不明白

Question

public static boolean checkNumber(String num,String type){  
    String eL = "";
    switch (type) {
        case "0+":
            eL = "^//d+$";//非负整数  
            break;
        case "+":
            eL = "^//d*[1-9]//d*$";//正整数  
            break;
        case "-0":
            eL = "^((-//d+)|(0+))$";//非正整数  
            break;
        case "-":
            eL = "^-//d*[1-9]//d*$";//负整数  
            break;
        default:
            eL = "^-?//d+$";//整数  
            break;
    }
    Pattern p = Pattern.compile(eL);
    Matcher m = p.matcher(num);  
    boolean b = m.matches();
    return b;  
}      

String ss = "333";
out.println(isType.checkNumber(ss,"+"));

    百度里找的例子，为什么传入任何数字都是false

Answer 1

试试把//d改为\d