如何使用扫描器类编写程序应该只打印字符串值而不是整数值

Question

i want to write a program where scanner takes input of integers and strings at output it should not print integer value it has to print only string value..

input int value =6;
input string value ="hello"

output=hello

Scanner sc = new Scanner(System.in);
int x= sc.nextInt(); 
String v=sc.nextLine();
String v1 =sc.nextLine();
System.out.println(x+v1);

Answer 1

If you don't want to print integer values, you can write a custom Printer class with overloaded print and println methods for numeric types, like this:

class MyPrinter{
  // constructors and stuff
  void print(int i){
    System.out.print('');
    // or you may as well just return;
  }
}

and if you dont want to print numbers at all you can also modify the function for String argument:

void print(String s){
  System.out.print(s.replaceAll("[0-9]+",""));
}

and this way, even if you concatenate numbers to your string, they won't be printed.

Answer 2

If you just want to print values in string format, than you should write it like this.

System.out.println(v1);

Because x is integer and v1 is string.

If you print this:

System.out.println(x + v1);

This is going to automaticly convert x to string and print both values concatenated as string.