edit a txt file using java
FileWriter fw = new FileWriter ("file.txt", true);
PrintWriter pw = new PrintWriter (fw);
/*
filewriter creates the file that printwriter can edit.
*/edit a txt file using java
FileWriter fw = new FileWriter ("file.txt", true);
PrintWriter pw = new PrintWriter (fw);
/*
filewriter creates the file that printwriter can edit.
*/java create file
String fileData = "yourContent";
FileOutputStream fos = new FileOutputStream("yourFile.txt");
fos.write(fileData.getBytes());
fos.flush();
fos.close();decode json file in java tutorial
package com.howtodoinjava.demo.jsonsimple;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
public class ReadJSONExample
{
@SuppressWarnings("unchecked")
public static void main(String[] args)
{
//JSON parser object to parse read file
JSONParser jsonParser = new JSONParser();
try (FileReader reader = new FileReader("employees.json"))
{
//Read JSON file
Object obj = jsonParser.parse(reader);
JSONArray employeeList = (JSONArray) obj;
System.out.println(employeeList);
//Iterate over employee array
employeeList.forEach( emp -> parseEmployeeObject( (JSONObject) emp ) );
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
private static void parseEmployeeObject(JSONObject employee)
{
//Get employee object within list
JSONObject employeeObject = (JSONObject) employee.get("employee");
//Get employee first name
String firstName = (String) employeeObject.get("firstName");
System.out.println(firstName);
//Get employee last name
String lastName = (String) employeeObject.get("lastName");
System.out.println(lastName);
//Get employee website name
String website = (String) employeeObject.get("website");
System.out.println(website);
}
}Copyright © 2021 Codeinu
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