java 方法 示例

扫描器类的hasNextShort()方法 (Scanner Class hasNextShort() method)

Syntax:

句法：

    public boolean hasNextShort();
public boolean hasNextShort(int rad);

• hasNextShort() method is available in java.util package.

  hasNextShort()方法在java.util包中可用。

• hasNextShort() method is used to check whether this Scanner has next token in its input can be manipulated as a short value in the implicit radix or not.

  hasNextShort()方法用于检查此扫描程序在其输入中是否具有下一个标记，可以将其作为隐式基数中的short值进行操作。

• hasNextShort(int rad) method is used to check whether this Scanner has next token in its input can be manipulated as a short value in the explicit radix(rad) or not.

  hasNextShort(int rad)方法用于检查此扫描程序在其输入中是否具有下一个标记是否可以作为显式基数(rad)中的short值进行操作。

• These methods may throw an exception at the time of representing input as a short value.

  在将输入表示为短值时，这些方法可能会引发异常。

  IllegalStateException: This exception may throw when this Scanner is not opened.

  IllegalStateException ：如果未打开此扫描器，则可能引发此异常。

• These are non-static methods, it is accessible with class object & if we try to access these methods with the class name then we will get an error.

  这些是非静态方法，可通过类对象访问；如果尝试使用类名称访问这些方法，则会收到错误消息。

Parameter(s):

参数：

• In the first case, hasNextShort(),

  在第一种情况下， hasNextShort() ，

  • It does not accept any parameter.

• In the second case, hasNextShort(int rad),

  在第二种情况下， hasNextShort(int rad) ，

  • int rad – represents the radix used to manipulate as a short value.
  • int rad –表示用作短值的基数。

Return value:

返回值：

In both the cases, the return type of the method is boolean, it returns true when this Scanner next input as a short valid value otherwise it returns false.

在这两种情况下，方法的返回类型是布尔值 ，当这种扫描仪下一个输入的短有效值否则返回false返回true。

Example:

例：

// Java program is to demonstrate the example
// of hasNextShort() method of Scanner
import java.util.*;
import java.util.regex.*;
public class HasNextShort {public static void main(String[] args) {String str = "Java Programming! 3 * 8= 24";
Short val = 125;
str = str + val;
// Instantiates Scanner
Scanner sc = new Scanner(str);
while (sc.hasNext()) {// By using hasNextShort() method is to
// check whether this object next token
// represents short or not in the default
// radix
boolean status = sc.hasNextShort();
System.out.println("sc.hasNextShort(): " + status);
// By using hasNextShort(radix) method is to
// check whether this object next token
// represents short in the given radix
// or not
status = sc.hasNextShort(4);
System.out.println("sc.hasNextShort(2): " + status);
sc.next();
}
// Scanner closed
sc.close();
}
}

Output

输出量

sc.hasNextShort(): false
sc.hasNextShort(2): false
sc.hasNextShort(): false
sc.hasNextShort(2): false
sc.hasNextShort(): true
sc.hasNextShort(2): true
sc.hasNextShort(): false
sc.hasNextShort(2): false
sc.hasNextShort(): false
sc.hasNextShort(2): false
sc.hasNextShort(): true
sc.hasNextShort(2): false

翻译自: https://www.includehelp.com/java/scanner-hasnextshort-method-with-example.aspx

java 方法 示例