Java

Examples, hints, and tips to help you code better in Java.

Delete a file or directory
- Java
Deleting a file or directory in Java is pretty simple. Create a File object and call the .delete() method on it.
```
import java.io.File;
 
File file = new File(filePath);
file.delete();
```
The .delete() method:
Returns true if the file/directory is deleted successfully
Returns false if the file/directory is not deleted (ie. file not found, file is open)
Throws a SecurityException if the application has insufficient permissions to delete the file/directory.
- Add new comment
- Read more

Read a text file using readLine()

Java

One of the simplest ways to read in a text file in Java is to use the readLine() method to read one line at a time. In this example the file is opened with a FileReader, buffered with a BufferedReader, and then read in using the readLine() method.

import java.io.*;
 
public class ReadTextFile {
 
    public static void main(String[] args) {
 
        StringBuilder contents = new StringBuilder();
 
        try {
            BufferedReader input =  new BufferedReader(new FileReader("C:\\Temp\\myFile.txt"));

For loop
- C++
- Java
This is an example of a typical for loop.
```
for( int var=0; var<10; var++) {
    // Code to execute    
}
```
The initiation of the for loop includes three different command seperated be semicolons.

First
In this example an integer named var is created and initialized to ;
If we are using a variable that has already being instantiated just enter the name of the variable and optionally assign it a new value.
ie.
```
int var = 0;
for(var=2; var<10; var++) {
    // Code to execute    
}
```
- Add new comment
- Read more

Hello World

Java

A basic java program.

class HelloWorld
{
    static public void main( String args[] )
    {
        System.out.println( "Hello World!" );
    }
}

Add new comment

Java

Delete a file or directory

Read a text file using readLine()

For loop

Hello World

Search the site