Java Scanner radix()方法及示例

java.util.Scanner 类的 radix() 方法返回该扫描仪的默认radix。

语法

public int radix()

返回值： 该函数返回该扫描仪的默认弧度。

下面的程序说明了上述函数。

程序1 :

// Java program to illustrate the
// radix() method of Scanner class in Java
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {
  
        String s = "Geeksforgeeks has Scanner methods";
  
        // create a new scanner
        // with the specified String Object
        Scanner scanner = new Scanner(s);
  
        // print a line of the scanner
        System.out.println("Scanner String:\n"
                           + scanner.nextLine());
  
        // print the default radix
        System.out.println("Default Radix value: "
                           + scanner.radix());
  
        // close the scanner
        scanner.close();
    }
}

输出:

Scanner String:
Geeksforgeeks has Scanner methods
Default Radix value: 10

程序2

// Java program to illustrate the
// radix() method of Scanner class in Java
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {
  
        String s = "Geeksforgeeks";
  
        // create a new scanner
        // with the specified String Object
        Scanner scanner = new Scanner(s);
  
        // print a line of the scanner
        System.out.println("Scanner String: "
                           + scanner.nextLine());
  
        // print the default radix
        System.out.println("Default Radix value: "
                           + scanner.radix());
  
        // change the radix of this scanner
        scanner.useRadix(30);
  
        System.out.println("Radix changed to 30");
  
        // print the default radix
        System.out.println("Default Radix value: "
                           + scanner.radix());
  
        // close the scanner
        scanner.close();
    }
}

输出:

Scanner String: Geeksforgeeks
Default Radix value: 10
Radix changed to 30
Default Radix value: 30

**参考资料: ** https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#radix()