I Am Stuck In My Project...i Need Help From A Good Java Programmer - Programming

I Am Stuck In My Project...i Need Help From A Good Java Programmer - Programming - Nairaland

Nairaland Forum › Science/Technology › Programming › I Am Stuck In My Project...i Need Help From A Good Java Programmer (1143 Views)

1 Reply

I Am Stuck In My Project...i Need Help From A Good Java Programmer by NigerianScholar(op): 10:49am On Oct 31, 2017

without boring you with the details..ill just say what i need to be done in my code. btw, i have imported the java io package
1. i need to be able to save the user input in a new file e.g txt file
2. i need to be able to save the user input in an existing file i.e to update
3. to list all the file names/directories in the folder.. to do it in cmd prompt you nav to the path and type dir
4. i need to be able to view a file specified by the user

Thank you for your help...feel free to mention anyone that may have relevant knowledge in this or give me the link to a java group chat

Re: I Am Stuck In My Project...i Need Help From A Good Java Programmer by seunthomas: 3:09pm On Oct 31, 2017



import java.io.*;
import java.util.*;

class Help{
private  File file;

protected File createFile(String filename){
   try{ 
   file = new File(filename);
 
 if (!file.exists()) {
  file.createNewFile();
}


}
catch(Exception ex){
    ex.printStackTrace();
    }
 
 return file;   
    }
    
public String readFile(String filename){
String output="";
   try{ 
   file = new File(filename);
 
 FileReader fr = new FileReader(file.getAbsolutePath());
 BufferedReader br = new BufferedReader(fr);

			String data;

			while ((data = br.readLine()) != null) {
			output = output + data ;
			}
 
}
catch(Exception ex){
    ex.printStackTrace();
    }
return output;
}

public void appendToFile(String filename,String data){

try
{
    boolean append=true;
    writeToFile(filename, data,append);
}
catch(Exception ex)
{
   ex.printStackTrace();
}

}

//String filename
//String data to write
//boolean append or just write
public void writeToFile(String filename,String data,boolean append){
try
{
    File f = createFile(filename);
    FileWriter fwrite = new FileWriter(f.getAbsoluteFile(),append); 
    fwrite.write(data); 
    fwrite.close();
}
catch(Exception ex)
{
   ex.printStackTrace();
}

}

public File[] getDir(String dir){
 
File folder = new File(dir);
File[] files = folder.listFiles();
return files;
}



public static void main(String args[]){
String filename="test.txt";
Help hlp = new Help();
hlp.writeToFile(filename,"Hello World\n",false);
for(int i=0;i<=1000;i++){
    
    hlp.appendToFile(filename,"Hello World "+String.valueOf(i)+"\n" ) ;
    
    }
}



}

2 Likes

Re: I Am Stuck In My Project...i Need Help From A Good Java Programmer by NigerianScholar(op): 3:41am On Nov 01, 2017

seunthomas:



import java.io.*;
import java.util.*;

class Help{
private  File file;

protected File createFile(String filename){
   try{ 
   file = new File(filename);
 
 if (!file.exists()) {
  file.createNewFile();
}


}
catch(Exception ex){
    ex.printStackTrace();
    }
 
 return file;   
    }
    
public String readFile(String filename){
String output="";
   try{ 
   file = new File(filename);
 
 FileReader fr = new FileReader(file.getAbsolutePath());
 BufferedReader br = new BufferedReader(fr);

			String data;

			while ((data = br.readLine()) != null) {
			output = output + data ;
			}
 
}
catch(Exception ex){
    ex.printStackTrace();
    }
return output;
}

public void appendToFile(String filename,String data){

try
{
    boolean append=true;
    writeToFile(filename, data,append);
}
catch(Exception ex)
{
   ex.printStackTrace();
}

}

//String filename
//String data to write
//boolean append or just write
public void writeToFile(String filename,String data,boolean append){
try
{
    File f = createFile(filename);
    FileWriter fwrite = new FileWriter(f.getAbsoluteFile(),append); 
    fwrite.write(data); 
    fwrite.close();
}
catch(Exception ex)
{
   ex.printStackTrace();
}

}

public File[] getDir(String dir){
 
File folder = new File(dir);
File[] files = folder.listFiles();
return files;
}



public static void main(String args[]){
String filename="test.txt";
Help hlp = new Help();
hlp.writeToFile(filename,"Hello World\n",false);
for(int i=0;i<=1000;i++){
    
    hlp.appendToFile(filename,"Hello World "+String.valueOf(i)+"\n" ) ;
    
    }
}



}

thank you i should get back to you as soon as i try it

1 Reply

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