To use theFileReaderin the application, we must first import it from packagejava.iousing the import statement. For creating the instance ofFileReader, use one of its constructors. 2.1. Using File Name StringfileName="c:\temp\test.txt";FileReaderinput=newFileReader(fileName); 2.2. UsingFile F...
To read a text file in Java, you can use the BufferedReader class from the java.io package. Here's an example of how to read a text file line by line in Java: import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException; public class Main { public static ...
Here is another example to show how to read a file in Java withBufferedInputStreamandDataInputStreamclasses. ThereadLine()from the typeDataInputStreamis deprecated. Sun officially announced this method can not convert property from bytes to characters. It’s advised to useBufferedReader. You may in...
For Java 7 or below, you can use the legacy File I/O API to read a text file line by line: try { // create a reader instance BufferedReader br = new BufferedReader(new FileReader("input.txt")); // read until end of file String line; while ((line = br.readLine()) != null)...
2.2 In the old days, we have to close everything manually. FileExample3.java packagecom.mkyong.calculator;importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassFileExample3{publicstaticvoidmain(String[] args){BufferedReaderbr=null;FileReaderfr=null;try{ ...
In this quick article, you'll learn how to read and write text files in Java. Reading Text Files Java provides multiple APIs to read a text file. The following example demonstrates how you can use the FileReader class to read every single character from the input file and print them on ...
Here is an example program to read a file line-by-line with ReadFileLineByLineUsingBufferedReader.java packagecom.journaldev.readfileslinebyline;importjava.io.BufferedReader;importjava.io.FileReader;importjava.io.IOException;publicclassReadFileLineByLineUsingBufferedReader{publicstaticvoidmain(String[]arg...
in.close(); out.close(); } } Read line by line Here is an example to read a text file line by line. importjava.io.BufferedReader;importjava.io.File;importjava.io.FileReader;/*fromjava2s.com*/publicclassMain {publicstaticvoidmain(String[] argv) {try{ ...
To read a JSON file into Java using the Simple JSON library, you can use the JSONObject class and the JSONArray class.
FileReader and FileWriter classes are used to read/write data from a text file in Java. Even though you can useFileInputStreamandFileOutputStream,FileReaderandFileWriterare more efficient and handles character encoding issues for you. You can see thedifference between FileReader and FileInputStreamto...