Java.io.Printstream Class in Java | Set 2

Last Updated : 01 May, 2024

Java.io.Printstream Class in Java | Set 1

More Methods:

PrintStream printf(Locale l, String format, Object... args) : A convenience method to write a formatted string to this output stream using the specified format string and arguments.

Syntax :public PrintStream printf(Locale l,
                 String format,
                 Object... args)
Parameters:
l - The locale to apply during formatting. If l is null then no localization is applied.
format - A format string as described in Format string syntax
args - Arguments referenced by the format specifiers in the format string.
Returns:
This output stream
Throws:
IllegalFormatException 
NullPointerException

Java

//Java program to demonstrate printf method
import java.io.*;
import java.util.Locale;

class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        String s = "for";
        
        // create printstream object
        PrintStream printStream = new PrintStream(System.out);
        
        // illustrating printf(Locale l, String format, Object... args) method
        printStream.printf(Locale.US, "Geeks%sGeeks", s);
    }
}

Output:
GeeksforGeeks

PrintStream printf(String format, Object... args) : A convenience method to write a formatted string to this output stream using the specified format string and arguments.

Syntax :public PrintStream printf(String format,
                 Object... args)
Parameters:
format - A format string as described in Format string syntax
args - Arguments referenced by the format specifiers in the format string.
Returns:
This output stream
Throws:
IllegalFormatException 
NullPointerException

Java

//Java program to demonstrate printf(String format, Object... args) method
import java.io.*;

public class PrintStreamDemo 
{
    public static void main(String[] args)
    {
        String s = "for";
        
        // create printstream object
        PrintStream obj= new PrintStream(System.out);
        
        // illustrating printf(String format, Object... args) method
        obj.printf("Geeks%sGeeks", s);
    }
}

Output:
GeeksforGeeks

void println(): Terminates the current line by writing the line separator string.

Syntax :public void println()

Java

//Java program to demonstrate println() methods
import java.io.PrintStream;

class PrintStreamDemo
{
    public static void main(String[] args)
    {
        PrintStream obj = new PrintStream(System.out);
        
        //illustrating println();
        obj.println("GeeksforGeeks");
    }
}

Output:
GeeksforGeeks

void println(boolean x): Prints a boolean and then terminate the line.

Syntax :public void println(boolean x)

Java

//Java program to demonstrate println(boolean) method
import java.io.*;

class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        // create printstream object
        PrintStream obj = new PrintStream(System.out);

        //illustrating println(boolean) method
        obj.println(true);

        // flush the stream
        obj.flush();
    }
}

Output:
true

void println(char x): Prints a character and then terminate the line.

Syntax :public void println(char x)

Java

//Java program to demonstrate println(char x) method
import java.io.*;

public class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        char c = 'g';
        
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
        
        // illustrating println(char x)
        obj.println(c);
        
        // flush the stream
        obj.flush();
    
    }
}

Output:
g

void println(char[] x): Prints an array of characters and then terminate the line.

Syntax :public void println(char[] x)

Java

//Java program to demonstrate println(char[] x) method
import java.io.*;

public class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        char[] c = {'G', 'E', 'E','K'};
    
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
    
        // illustrating println(char[] x)
        obj.println(c);
    
        // flush the stream
        obj.flush();
    }
}

Output:
GEEK

void println(double x): Prints a double and then terminate the line.

Syntax :public void println(double x)

Java

//Java program to demonstrate println(double x) method
import java.io.*;

public class PrintStreamDemo
{
    public static void main(String[] args) 
    {
        double c = 5.42762;
        
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
        
        // illustrating println(double x)
        obj.println(c);
        
        // flush the stream
        obj.flush();
    }
}

Output:

5.42762

void println(float x): Prints a float and then terminate the line.

Syntax :public void println(float x)

Java

//Java program to demonstrate println(float x) method
import java.io.*;
public class PrintStreamDemo
{
    public static void main(String[] args) 
    {
        float c = 5.168502f;
        
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
    
        // illustrating println(float x)
        obj.println(c);
        
        // flush the stream
        obj.flush();
    }
}

Output:

5.168502f

void println(int x): Prints an integer and then terminate the line.

Syntax :public void println(boolean x)

Java

//Java program to demonstrate println(int x) method
import java.io.*;

public class PrintStreamDemo
{
    public static void main(String[] args)
    {
        
        int c = 5;
        
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
        
        // illustrating println(int x)
        obj.println(c);
        
        // flush the stream
        obj.flush();
    }
}

Output:

void println(long x): Prints a long and then terminate the line.

Syntax :public void println(long x)

Java

//Java program to demonstrate println(long x) method

import java.io.*;
public class PrintStreamDemo 
{
    public static void main(String[] args)
    {
        long c = 123456789l;
        try 
        {
            // create printstream object
            PrintStream obj= new PrintStream(System.out);
            
            // illustrating println(long x)
            obj.println(c);
            
            // flush the stream
            obj.flush();
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }
    }
}

Output:

123456789

void println(Object x) :Prints an Object and then terminate the line.

Syntax :public void println(Object x)

Java

//Java program to demonstrate println(Object x) method
import java.io.*;

public class PrintStreamDemo 
{
    
    public static void main(String[] args) 
    {
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
        
        //illustrating println(Object X)
        obj.println(obj);
        
        // flush the stream
        obj.flush();
    }
}

Output:

java.io.PrintStream@15db9742

void println(String x) :Prints a String and then terminate the line.

Syntax :public void println(boolean x)

Java

import java.io.*;
//Java program to demonstrate println(String x) method
public class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        String c = "GeeksforGeeks";
        
        // create printstream object
        PrintStream ps = new PrintStream(System.out);
        
        // illustrating println(String x)
        ps.println(c);
        
        // flush the stream
        ps.flush();
    }
}

Output:

GeeksforGeeks

protected void setError() :Sets the error state of the stream to true.

Syntax :public void println(String x)

Java

//Java program to demonstrate setError() method
import java.io.*;

public class PrintStreamDemo extends PrintStream 
{
    public PrintStreamDemo(OutputStream out) 
    {
        super(out);
    }
    public static void main(String[] args) 
    {
        byte c[] = {65, 66, 67, 68, 69, 70, 71};
        
        // create printstream object
        PrintStreamDemo obj = new PrintStreamDemo(System.out);
        
        // illustrating write() method
        obj.write(c, 1, 3);
        
        // flush the stream
        obj.flush();
        
        //illustrating setError() method 
        obj.setError();
    }
}

Output:

BCD

void write(byte[] buf, int off, int len) :Writes len bytes from the specified byte array starting at offset off to this stream.

Syntax :public void write(byte[] buf,
         int off,
         int len)
Overrides:
write in class FilterOutputStream
Parameters:
buf - A byte array
off - Offset from which to start taking bytes
len - Number of bytes to write

Java

//Java program to demonstrate write(int b) method
import java.io.*;

public class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        byte c = 65;
    
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
        
        //illustrating write(int b)
        obj.write(c);
    
        // flush the stream
        obj.flush();
    
    }
}

Output:

BCD

void write(int b) :Writes the specified byte to this stream.

Syntax :public void write(int b)
Overrides:
write in class FilterOutputStream
Parameters:
b - The byte to be written

Java

//Java program to demonstrate write(int b) method
import java.io.*;

public class PrintStreamDemo 
{
    public static void main(String[] args) 
    {
        byte c = 65;
        
        // create printstream object
        PrintStream obj = new PrintStream(System.out);
        
        //illustrating write(int b)
        obj.write(c);
        
        // flush the stream
        obj.flush();
    
    }
}