The checkError() method of PrintStream Class in Java is used to check the error state of this PrintStream instance. This method flushes the stream in order to check the error state. It returns a boolean value that tells if the stream has encountered any error or not.
Syntax:
public boolean checkError()
Parameters: This method do not accepts any parameter.
Return Value: This method returns a boolean value stating whether the Stream has encountered any error or not. It returns true if any error has been encountered. Else it returns false.
Below methods illustrates the working of checkError() method:
Program 1:
// Java program to demonstrate// PrintStream checkError() method  import java.io.*;  class GFG {    public static void main(String[] args)    {          // The string to be written in the Stream        String str = "GeeksForGeeks";          try {              // Create a PrintStream instance            PrintStream stream                = new PrintStream(System.out);              // Write the above string to this stream            // This will put the string in the stream            // till it is printed on the console            stream.print(str);              // Now check the stream            // using checkError() method            System.out.println("\nHas any error occurred: "                               + stream.checkError());        }        catch (Exception e) {            System.out.println(e);        }    }} |
Output:
GeeksForGeeks Has any error occurred: false
Program 2:
// Java program to demonstrate// PrintStream checkError() method  import java.io.*;  class GFG {    public static void main(String[] args)    {          try {              // Create a PrintStream instance            PrintStream stream                = new PrintStream(System.out);              // Write the char to this stream            // This will put the char in the stream            // till it is printed on the console            stream.write(65);              // Now check the stream            // using checkError() method            System.out.println("\nHas any error occurred: "                               + stream.checkError());        }        catch (Exception e) {            System.out.println(e);        }    }} |
Output:
A Has any error occurred: false
