Java中的格式化程序 ioException() 方法和示例
ioException()方法是Java.util.Formatter的内置方法,它返回此格式化程序的 Appendable 最后抛出的 IOException。如果目标的append()方法从不抛出 IOException,则此方法将始终返回 null。
语法:
public IOException ioException()
参数:该函数不接受任何参数。
返回值:该函数返回格式化程序的可附加项最后抛出的 IOException。
下面是上述函数的实现:
方案一:
// 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
方案二:
// 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: Java/util/Formatter.html#flush()