DN07

src/DN07.java

@@ -0,0 +1,59 @@
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.Scanner;
+
+public class DN07 {
+    public static void main(String[] args) {
+        Planet[] planeti;
+        try {
+            planeti = preberiPlanete(args[0]);
+        } catch (FileNotFoundException e) {
+            System.out.println("Datoteka ne obstaja");
+            return;
+        }
+
+        String[] imena = args[1].toLowerCase().split("\\+");
+
+        double sum = 0;
+        for (String ime : imena) {
+            for (Planet planet :planeti) {
+                if (planet.ime.equals(ime)) {
+                    sum += planet.povrsina();
+                }
+            }
+        }
+
+        System.out.printf("Povrsina planetov \"%s\" je %d milijonov km2\n", args[1], Math.round(sum / 1000000));
+    }
+
+    static Planet[] preberiPlanete(String datoteka) throws FileNotFoundException {
+        File file = new File(datoteka);
+        Scanner scanner = new Scanner(file);
+
+        Planet[] planeti = new Planet[8];
+        for (int i = 0; i < 8; i++) {
+            if (!scanner.hasNextLine()) break;
+
+            String line = scanner.nextLine();
+            String[] parts = line.split(":");
+
+            planeti[i] = new Planet(parts[0].toLowerCase(), Integer.parseInt(parts[1]));
+        }
+
+        return planeti;
+    }
+}
+
+class Planet {
+    String ime;
+    int radij;
+
+    public Planet(String ime, int radij) {
+        this.ime = ime;
+        this.radij = radij;
+    }
+
+    public double povrsina() {
+        return 4*Math.PI*radij*radij;
+    }
+}