import java.util.Scanner; 判断为publicstaticvoidmain (stringpddmpargs )/todo auto-generatedmethodstubscannerscanner=new scanner )是多少位int num=scanner.nextInt (; system.out.println(pan ) (num ); }privatestaticintpan(intnum )/todo auto-generatedmethodstubintcount=0; while(num1) {num /=10; 出局; }返回计数1; }