Java 中的格式化程序 ioException()方法，示例

原文:https://www . geesforgeks . org/formatter-ioexception-method-in-Java-with-examples/

ioException() 方法是 java.util.Formatter 的内置方法，它返回由该格式化程序的 Appendable 最后引发的 ioException。如果目的地的 append() 方法从不抛出 IOException，那么这个方法将总是返回 null。

语法 :

public IOException ioException()

参数:该功能不接受参数。

返回值:函数返回格式化程序的可追加的最后抛出的 IOException。

下面是上述功能的实现:

程序 1:

// Java program to implement
// the above function

import java.util.Formatter;
import java.util.Locale;

public class Main {

    public static void main(String[] args)
    {

        // Get the string Buffer
        StringBuffer buffer
            = new StringBuffer();

        // Object creation
        Formatter frmt
            = new Formatter(buffer,
                            Locale.CANADA);

        // Format a new string
        String name = "My name is Gopal Dave";
        frmt.format("What is your name? \n%s !",
                    name);

        // Print the Formatted string
        System.out.println(frmt);

        // flushes the formatter
        frmt.flush();
        System.out.println("Flushed");
    }
}

输出:

What is your name? 
My name is Gopal Dave !
Flushed

程序二:

// Java program to implement
// the above function

import java.util.Formatter;
import java.util.Locale;

public class Main {

    public static void main(String[] args)
    {

        // Get the string Buffer
        StringBuffer buffer
            = new StringBuffer();

        // Object creation
        Formatter frmt
            = new Formatter(buffer,
                            Locale.CANADA);

        // Format a new string
        String name = "My name is Gopal Dave";
        frmt.format("What is your name? \n%s !",
                    name);

        System.out.println("The last exception thrown: "
                           + frmt.ioException());

        // Closes the format
        frmt.close();
    }
}

输出:

The last exception thrown: null

输出:

The last exception thrown: null

参考:https://docs . Oracle . com/javase/10/docs/API/Java/util/formatter . html # flush()

版权属于：月萌API www.moonapi.com，转载请注明出处

本文链接：https://moonapi.com/news/20628.html