String IntValue = "222"; boolean isInt = false; try{ int v = Integer.parseInt(IntValue); isInt = true; }catch(Exception e){ System.out.println("对不起,不是数字"); }
try: public boolean validate(String id) { boolean result = true; for (int i = 0; i < id.length(); i++) { if (Character.isDigit(id.charAt(i)) == false) result = false; } return result; }
boolean isInt = false;
try{
int v = Integer.parseInt(IntValue);
isInt = true;
}catch(Exception e){
System.out.println("对不起,不是数字");
}
for (int i = 0; i < id.length(); i++) {
if (Character.isDigit(id.charAt(i)) == false)
result = false;
}
return result;
}