PushbackReader markSupported() method in Java with Examples
Last Updated :
29 Apr, 2019
The markSupported() method of PushbackReader Class in Java is used to check whether this PushbackReader is supports mark() operation or not. It returns a boolean which states if the reader is mark supported.
Syntax:
public boolean markSupported()
Parameters: This method does not accepts any parameters
Return Value: This method returns a boolean value which tells if this PushbackReader supports mark() operation or not. It return true if it is markSupported. Else it returns false.
Below methods illustrates the working of markSupported() method:
Program 1:
import java.io.*;
import java.util.*;
class GFG {
public static void main(String[] args)
{
try {
String s = "GeeksForGeeks" ;
StringReader stringReader
= new StringReader(s);
PushbackReader pushbackReader
= new PushbackReader(stringReader);
System.out.println( "Is mark() supported:"
+ pushbackReader.markSupported());
pushbackReader.close();
System.out.println( "Stream Closed." );
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
Is mark() supported:false
Stream Closed.
Program 2:
import java.io.*;
import java.util.*;
class GFG {
public static void main(String[] args)
{
try {
String s = "GFG" ;
StringReader stringReader
= new StringReader(s);
PushbackReader pushbackReader
= new PushbackReader(stringReader);
System.out.println( "Is mark() supported:"
+ pushbackReader.markSupported());
pushbackReader.close();
System.out.println( "Stream Closed." );
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
Is mark() supported:false
Stream Closed.
Reference: https://docs.oracle.com/javase/9/docs/api/java/io/PushbackReader.html#markSupported–
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