java read file

1. How do you read a text file in Java?
2. What is the best way to read file in Java?
3. What does read () do in Java?
4. How do you load a file in Java?
5. What is Java Inputstream file?
6. How do you read a specific text file in Java?
7. How do I read properties file?
8. How do you split a string in Java?
9. How do you read a comma separated text file in Java?
10. Can we read method in Java?
11. What method do you use to read a real number Java?
12. Which is valid keyword in Java?

How do you read a text file in Java?

There are several ways to read a plain text file in Java e.g. you can use FileReader, BufferedReader or Scanner to read a text file. Every utility provides something special e.g. BufferedReader provides buffering of data for fast reading, and Scanner provides parsing ability.

What is the best way to read file in Java?

If you want to read a file line by line, using BufferedReader is a good choice. BufferedReader is efficient in reading large files. The readline() method returns null when the end of the file is reached.

What does read () do in Java?

read() method reads the next byte of the data from the the input stream and returns int in the range of 0 to 255. If no byte is available because the end of the stream has been reached, the returned value is -1.

How do you load a file in Java?

In the above code snippet, we used the current class to load a file using getResourceAsStream method and passed the absolute path of the file to load. The same method is available on a ClassLoader instance as well: ClassLoader classLoader = getClass(). getClassLoader(); InputStream inputStream = classLoader.

What is Java Inputstream file?

Java FileInputStream class obtains input bytes from a file. It is used for reading byte-oriented data (streams of raw bytes) such as image data, audio, video etc. You can also read character-stream data.

How do you read a specific text file in Java?

1. // Iterate all Files one by one to Read Text Information.
2. for (int i = 0; i < listOfFiles.length; i++)
3. File file = listOfFiles[i];
4. String line = null;
5. String fileName = file.getName();
6. // Initiate count to capture number of line in the output.
7. int count = 0;
8. try

How do I read properties file?

Test.java

1. import java.util.*;
2. import java.io.*;
3. public class Test
4. public static void main(String[] args)throws Exception
5. FileReader reader=new FileReader("db.properties");
6. Properties p=new Properties();
7. p.load(reader);
8. System.out.println(p.getProperty("user"));

How do you split a string in Java?

Following are the two variants of split() method in Java:

1. Public String [ ] split ( String regex, int limit )
2. public String[] split(String regex) This variant of split method takes a regular expression as parameter, and breaks the given string around matches of this regular expression regex. Here by default limit is 0.

How do you read a comma separated text file in Java?

Reading and Writing CSVs in Java

1. Use FileReader to open the CSV file.
2. Create a BufferedReader and read the file line by line until an "End of File" (EOF) character is reached.
3. Use the String. split() method to identify the comma delimiter and split the row into fields.

Can we read method in Java?

The canRead()function is a part of the File class in Java. This function determines whether the program can read the file denoted by the abstract pathname. The function returns true if the abstract file path exists and the application is allowed to read the file.

What method do you use to read a real number Java?

Double(); Key:a The correct method to read a real number is nextDouble(). # 4. The following code fragment reads in two numbers: Scanner input = new Scanner(System.in); int i = input.

Which is valid keyword in Java?

1. Which of these is a valid keyword in Java? Explanation: “String” and “Float” are class types in Java. “unsigned” is a keyword used in C/C++ but not in Java.