# 39 How to use System.out & BufferedWriter class in Java?|System.out BufferedWriter|Java|RedSysTech

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In this video, we are learning the below concepts:

1. What are output streams in Java?


3. How to display on the screen to the user as output in Java?

4. Detailed explanation about the output streams in Java with real time coding

5. What is a System class in Java?




6. What is BufferedWriter class in Java?

7. How to use BufferedWriter class to write the data into a file in Java?

BufferedWriter bw = new BufferedWriter(fw);

8. difference between print vs println vs printf in java

9. What is FileWriter class in Java?

Here is the source code:
---------------------------------------

public class OutputStreamsDemo {

public static void main(String[] args) throws IOException {

//DisplayOnScreenDemo(); //Display on the screen
BufferedWriterFileOutputDemo(); //Keyboard

}

public static void DisplayOnScreenDemo() {


// print


// println


// printf
int x = 10;
float y = 3.14f;


}



public static void BufferedWriterFileOutputDemo() throws IOException {

String[] list = {"one", "two", "three", "four"};

// File
FileWriter fw = new FileWriter(f);
BufferedWriter bw = new BufferedWriter(fw);

for (String s : list) {
}

}



}

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