PrintStream checkError() in Java

checkError(): This method is available in the java.io.PrintStream class of Java.

Syntax:

boolean java.io.PrintStream.checkError()

This method flushes the stream and checks its error state. The internal error state is set to true when the underlying output stream throws an IOException other than InterruptedIOException, and when the setError method is invoked.

If an operation on the underlying output stream throws an InterruptedIOException, then the PrintStream converts the exception back into an interrupt by doing: Thread.currentThread().interrupt(); or the equivalent.

Parameters: NA

Returns: true if and only if this stream has encountered an IOException other than InterruptedIOException, or the setError method has been invoked.

Exceptions: NA

Approach

Java

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;

public class PrintStreamcheckError {
    public static void main(String[] args) 
                   throws FileNotFoundException {

        File file = new File("D:\\hello.txt");
        PrintStream printStream = new PrintStream(file);

        System.out.println(printStream.checkError());

        printStream.close();
    }
}

Output:

false

Some other methods of PrintStream

append(char): This method appends the specified character to this output stream.

append(CharSequence): This method appends the specified character sequence to this output stream.

append(CharSequence, int, int): This method appends a subsequence of the specified character sequence to this output stream.

checkError(): This method flushes the stream and checks its error state.

close(): This is done by flushing the stream and then closing the underlying output stream.

flush(): This method flushes the stream.

format(String, Object...): This method writes a formatted string to this output stream using the specified format string and arguments.

format(Locale, String, Object...): This method writes a formatted string to this output stream using the specified format string and arguments.

print(boolean): This method prints a boolean value.

printf(String, Object...): It is a convenient method to write a formatted string to this output stream using the specified format string and arguments.

printf(Locale, String, Object...): It is a convenient method to write a formatted string to this output stream using the specified format string and arguments.

println(): This method terminates the current line by writing the line separator string.

PrintStream(File): This method creates a new print stream, without automatic line flushing, with the specified file.

PrintStream(OutputStream, boolean, String): This method creates a new print stream, with the specified OutputStream, line flushing, and character encoding.

PrintStream(OutputStream): This method creates a new print stream, without automatic line flushing, with the specified OutputStream.

PrintStream(String): This method creates a new print stream, without automatic line flushing, with the specified file name.

PrintStream(File, Charset): This method creates a new print stream, without automatic line flushing, with the specified file and charset.

PrintStream(File, String): This method creates a new print stream, without automatic line flushing, with the specified file and charset.

PrintStream(OutputStream, boolean): This method creates a new print stream, with the specified OutputStream and line flushing.

PrintStream(String, Charset): This method creates a new print stream, without automatic line flushing, with the specified file name and charset.

PrintStream(String, String): This method creates a new print stream, without automatic line flushing, with the specified file name and charset.

PrintStream(OutputStream, boolean, Charset): This method creates a new print stream, with the specified OutputStream, line flushing, and charset.

write(byte[]):  This method writes all bytes from the specified byte array to this stream.

write(int): This method writes the specified byte to this stream.

write(byte[], int, int): This method writes len bytes from the specified byte array starting to offset off to this stream.

writeBytes(byte[]): This method writes all bytes from the specified byte array to this stream.