Java中PrintWriter类的setError()方法用于设置此PrintWriter实例的错误状态。此方法用作指示符,以指示流中已发生错误。它受到保护,因此需要通过派生PrintWriter类来使用它来实现。
用法:
protected void setError()
参数:此方法不接受任何参数。
返回值:此方法不返回任何内容。
下面的方法说明了setError()方法的用法方式:
示例1:
// Java program to demonstrate
// PrintWriter setError() method
import java.io.*;
// extending the PrintWriter Class
class GFG extends PrintWriter {
// Defining the protected constructor
public GFG(OutputStream out)
{
super(System.out);
}
// Driver Code
public static void main(String[] args)
{
// The string to be written in the Writer
String str = "GeeksForGeeks";
try {
// Create a GFG instance
GFG writer
= new GFG(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);
writer.flush();
// Use the protected setError() method
writer.setError();
}
catch (Exception e) {
System.out.println(e);
}
}
}
输出:
GeeksForGeeks
示例2:
// Java program to demonstrate
// PrintWriter setError() method
import java.io.*;
// extending the PrintWriter Class
class GFG extends PrintWriter {
// Defining the protected constructor
public GFG(OutputStream out)
{
super(System.out);
}
// Driver Code
public static void main(String[] args)
{
try {
// Create a GFG instance
GFG writer
= new GFG(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);
writer.flush();
// Use the protected setError() method
writer.setError();
}
catch (Exception e) {
System.out.println(e);
}
}
}
输出:
A
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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 setError() 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。