> For the complete documentation index, see [llms.txt](https://educacion.gitbook.io/programacion/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://educacion.gitbook.io/programacion/exercicios-java/ud5-solucions/solucions-clase-file.md).

# Solucións Clase File

1. Ficheiros e directorios

```java
import java.io.File;
import java.io.IOException;

public class EstructuraFicheros {

    public static void main(String[] args) {
        try {
            //Path
            String path = "C:\\Users\\iagom\\Desktop\\";

            // Directorio1
            File dir1 = new File(path+"Directorio1");
            if (!dir1.mkdir()) {
                System.out.println("Error creando fichero" + dir1.getName());
            }

            // Ficheros dentro de Directorio1
            File f1 = new File(dir1, "Fichero1.txt");
            File f2 = new File(dir1, "Fichero2.txt");
            if (!f1.createNewFile()) {
                System.out.println("Error creando fichero" + f1.getName());
            }
            if (!f2.createNewFile()) {
                System.out.println("Error creando fichero" + f2.getName());
            }

            // Directorio2 dentro de Directorio1
            File dir2 = new File(dir1, "Directorio2");
            if (!dir2.mkdir()) {
                System.out.println("Error creando fichero" + dir2.getName());
            }
            File f3 = new File(dir2, "Fichero3.txt");
            if (!f3.createNewFile()) {
                System.out.println("Error creando fichero" + f3.getName());
            }
            // Directorio3 dentro de Directorio1
            File dir3 = new File(dir1, "Directorio3");
            if (!dir3.mkdir()) {
                System.out.println("Error creando fichero" + dir3.getName());
            }
            File f4 = new File(dir3, "Fichero4.txt");
            if (!f4.createNewFile()) {
                System.out.println("Error creando fichero" + f4.getName());
            }

            // Directorio5 dentro de Directorio3
            File dir5 = new File(dir3, "Directorio5");
            if (!dir5.mkdir()) {
                System.out.println("Error creando fichero" + dir5.getName());
            }
            File f5 = new File(dir5, "Fichero5.txt");
            if (!f5.createNewFile()) {
                System.out.println("Error creando fichero" + f5.getName());
            }

            System.out.println("Estructura creada con éxito.");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
```

2. 1 Nivel

```java
import java.io.File;
import java.util.Date;

public class ListarNivel {

    public static String permisos(File f) {
        return (f.canRead() ? "r" : "-") +
               (f.canWrite() ? "w" : "-") +
               (f.canExecute() ? "x" : "-");
    }

    public static String datos(File f) {
        String tipo = f.isDirectory() ? "Directorio" : "Fichero";
        String extra = f.isDirectory()
                ? " elementos: " + (f.list() != null ? f.list().length : 0)
                : " tam: " + f.length();

        return tipo + ": " + f.getName() +
               extra +
               " ultMod: " + new Date(f.lastModified()) +
               " permisos: " + permisos(f) + "\n";
    }

    public static void listarUnNivel(File directorio) {
        if (directorio.isDirectory()) {
            System.out.println(datos(directorio));

            File[] elementos = directorio.listFiles();
            if (elementos != null) {
                for (File f : elementos) {
                    System.out.println(datos(f));
                }
            }
        } else {
            System.out.println("El elemento proporcionado no es un directorio");
        }
    }

    public static void main(String[] args) {
        File inicial = new File("C:\\Users\\iagom\\Desktop\\Directorio1");
        listarUnNivel(inicial);
    }
}

```

3. Recursiva

```java
import java.io.File;
import java.util.Date;

public class ListarDirectorio {

    public static String permisos(File f) {
        return (f.canRead() ? "r" : "-") +
               (f.canWrite() ? "w" : "-") +
               (f.canExecute() ? "x" : "-");
    }

    public static String datos(File f) {
        String tipo = f.isDirectory() ? "Directorio" : "Fichero";
        String extra = f.isDirectory()
                ? " elementos: " + (f.list() != null ? f.list().length : 0)
                : " tam: " + f.length();

        return tipo + ": " + f.getName() +
               extra +
               " ultMod: " + new Date(f.lastModified()) +
               " permisos: " + permisos(f) + "\n";
    }

    public static void listar(File f, String tab, StringBuilder sb) {
        sb.append(tab).append(datos(f));

        if (f.isDirectory()) {
            File[] elementos = f.listFiles();
            if (elementos != null) {
                for (File e : elementos) {
                    listar(e, tab + "  ", sb); 
                }
            }
        }
    }

    public static void main(String[] args) {
        File inicial = new File("C:\\Users\\iagom\\Desktop\\Directorio1");
        StringBuilder sb = new StringBuilder();

        if (inicial.isDirectory()) {
            listar(inicial, "", sb);
            System.out.println(sb);
        } else {
            System.out.println("El elemento proporcionado no es un directorio");
        }
    }
}

```


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