How do you read an InputStream line by line?

How do you read an InputStream line by line?

Read line of chars from console with InputStream

  1. Use to get the standard InputStream.
  2. Create a new BufferedReader with a new InputStreamReader with the specified InputStream.
  3. Use readLine() API method of BufferedReader to read a line of text.
  4. Close the BufferedReader, using the close() API method,

How do I read the first line of a file in Java?

How to read the first line of a file in Java

  1. import *;
  2. public class Main {
  3. public static void main(String[] args) throws IOException {
  4. //open the file.
  5. FileReader file = new FileReader(“file.txt”);
  6. BufferedReader buffer = new BufferedReader(file);
  7. //read the 1st line.
  8. String line = buffer. readLine();

What is the first line of a .Java file?

The first line defines a class called Main. In Java, every line of code that can actually run needs to be inside a class. This line declares a class named Main , which is public , that means that any other class can access it.

How do you read two lines in Java?

Another way to read multiple lines from the console can be done using the synchronized BufferedReader class in Java. The idea is to read each line using the readLine() method and use String. split() to split the line into individual tokens using whitespace as a delimiter. We can also use the StringTokenizer class.

How do I remove the first line of a string in Java?

Assuming there’s a new line at the end of the string that you would like to remove, you can do this: s = s. substring(s. indexOf(‘\n’)+1);

Can we read InputStream twice in Java?

If you can’t you’ll have to open a stream again. Another solution would be to convert InputStream to byte array, then iterate over the array as many time as you need. You can find several solutions in this post Convert InputStream to byte array in Java using 3rd party libs or not.

What is the first line in Java?

How do you convert an InputStream into string in Java?

To convert an InputStream Object int to a String using this method.

  1. Instantiate the Scanner class by passing your InputStream object as parameter.
  2. Read each line from this Scanner using the nextLine() method and append it to a StringBuffer object.
  3. Finally convert the StringBuffer to String using the toString() method.