Java中PrintWriter类的checkError()方法用于检查此PrintWriter实例的错误状态。此方法刷新流以检查错误状态。它返回一个布尔值,该值指示流是否遇到任何错误。
用法:
public boolean checkError()
参数:此方法不接受任何参数。
返回值:此方法返回一个布尔值,该值指示Stream是否遇到任何错误。如果遇到任何错误,则返回true。否则返回false。
下面的方法说明了checkError()方法的用法方式:
示例1:
// Java program to demonstrate
// PrintWriter checkError() method
import java.io.*;
class GFG {
public static void main(String[] args)
{
// The string to be written in the Writer
String str = "GeeksForGeeks";
try {
// Create a PrintWriter instance
PrintWriter writer
= new PrintWriter(System.out);
// Write the above string to this writer
// This will put the string in the stream
// till it is printed on the console
writer.write(str);
// Now check the stream
// using checkError() method
System.out.println("\nHas any error occurred: "
+ writer.checkError());
}
catch (Exception e) {
System.out.println(e);
}
}
}
输出:
GeeksForGeeks Has any error occurred: false
示例2:
// Java program to demonstrate
// PrintWriter checkError() method
import java.io.*;
class GFG {
public static void main(String[] args)
{
try {
// Create a PrintWriter instance
PrintWriter writer
= new PrintWriter(System.out);
// Write the char to this writer
// This will put the char in the stream
// till it is printed on the console
writer.write(65);
// Now check the stream
// using checkError() method
System.out.println("\nHas any error occurred: "
+ writer.checkError());
}
catch (Exception e) {
System.out.println(e);
}
}
}
输出:
A Has any error occurred: false
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注:本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 PrintWriter checkError() method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。