Aufgabenblatt 8

src/Aufgabe8Test.java

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+
+import java.util.HashSet;
+import java.util.NoSuchElementException;
+
+public class Aufgabe8Test {
+
+    public static void main(String[] args) {
+
+        /* //TODO: uncomment for testing
+
+        MassiveForceTreeMap map = new MassiveForceTreeMap();
+        NamedBody mars;
+
+        map.put(new NamedBody("Oumuamua", 8e6, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Earth", 5.972E24, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Moon", 7.349E22, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(mars = new NamedBody("Mars", 6.41712E23, new Vector3(0, 0, 0),
+                        new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Deimos", 1.8E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Phobos", 1.08E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Mercury", 3.301E23, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Venus", 4.86747E24, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Vesta", 2.5908E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Pallas", 2.14E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Hygiea", 8.32E19, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Ceres", 9.394E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+
+
+        System.out.println("Test1:");
+        MassiveIterator iterator = map.getKeys().iterator();
+        int count = 0;
+        while(iterator.hasNext()) {
+            if (iterator.next().equals(mars)) {
+                iterator.remove();
+            }
+            count++;
+        }
+        testValue(count, 12);
+        testValue(map.getKeys().size(), 11);
+        testValue(map.getKeys().contains(mars), false);
+
+        System.out.println("Test2:");
+        try {
+            iterator.next();
+            // this statement must not be reached
+            testValue(true, false);
+        } catch (NoSuchElementException e) {
+            testValue(true, true);
+        }
+
+        System.out.println("Test3:");
+        iterator = map.getKeys().iterator();
+        while(iterator.hasNext()) {
+            iterator.next();
+            iterator.remove();
+        }
+        testValue(map.getKeys().size(),0);
+
+        */ //TODO: uncomment
+    }
+
+    public static void testComparison(Object first, Object second, boolean expected) {
+        boolean real = first == second;
+
+        if (real == expected) {
+            System.out.println("Successful comparison");
+        } else {
+            System.out.println("Comparison NOT successful! Expected value: " + expected + " / Given value: " + real);
+        }
+    }
+
+    public static void testValue(Object given, Object expected) {
+        if (given == expected) {
+            System.out.println("Successful test");
+        } else {
+            System.out.println("Test NOT successful! Expected value: " + expected + " / Given value: " + given);
+        }
+    }
+
+    public static void testValue(double given, double expected) {
+        if (given < expected + (expected + 1) / 1e12 && given > expected - (expected + 1) / 1e12) {
+            System.out.println("Successful test");
+        } else {
+            System.out.println("Test NOT successful! Expected value: " + expected + " / Given value: " + given);
+        }
+    }
+
+}

src/ReadDataUtil.java

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+import java.io.*;
+
+public class ReadDataUtil {
+
+    // Reads the position and velocity vector on the specified 'day' from the file with the
+    // specified 'path', and sets position and current velocity of 'b' accordingly. If
+    // successful the method returns 'true'. If the specified 'day' was not found in the file,
+    // 'b' is unchanged and the method returns 'false'.
+    // The file format is validated before reading the state.
+    // Lines before the line "$$SOE" and after the line "$$EOE" the are ignored. Each line of the
+    // file between the line "$$SOE" and the line "$$EOE" is required to have the following format:
+    // JDTDB, TIME, X, Y, Z, VX, VY, VZ
+    // where JDTDB is interpretable as a 'double' value, TIME is a string and X, Y, Z, VX, VY and
+    // VZ are interpretable as 'double' values. JDTDB can be ignored. The character ',' must only
+    // be used as field separator. If the file is not found, an exception of the class
+    // 'StateFileNotFoundException' is thrown. If it does not comply with the format described
+    // above, the method throws an exception of the class 'StateFileFormatException'. Both
+    // exceptions are subtypes of 'IOException'.
+    // Precondition: b != null, path != null, day != null and has the format YYYY-MM-DD.
+    public static boolean readConfiguration(NamedBody b, String path, String day)
+            throws IOException {
+
+            // TODO: implement this method.
+            return false;
+        }
+    }
+

src/Simulation8.java

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+import codedraw.CodeDraw;
+
+// Simulates the solar system.
+//
+public class Simulation8 {
+
+    // gravitational constant
+    public static final double G = 6.6743e-11;
+
+    // one astronomical unit (AU) is the average distance of earth to the sun.
+    public static final double AU = 150e9; // meters
+
+    // set some system parameters
+    public static final double SECTION_SIZE = 10 * AU; // the size of the square region in space
+
+    // all quantities are based on units of kilogram respectively second and meter.
+
+    // The main simulation method using instances of other classes.
+    public static void main(String[] args) {
+
+        // simulation
+        CodeDraw cd = new CodeDraw();
+
+        // create solar system with 13 bodies
+        MassiveForceTreeMap map = new MassiveForceTreeMap();
+
+        map.put(new NamedBody("Oumuamua", 8e6, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Earth", 5.972E24, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Moon", 7.349E22, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Mars1", 6.41712E23, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Deimos", 1.8E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Phobos", 1.08E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Mercury", 3.301E23, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Venus", 4.86747E24, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Vesta", 2.5908E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Pallas", 2.14E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Hygiea", 8.32E19, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+        map.put(new NamedBody("Ceres1", 9.394E20, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+
+
+        //TODO: implementation of this method according to 'Aufgabenblatt8.md'.
+
+        // add sun after states have been read from files.
+        map.put(new NamedBody("Sun", 1.989E30, new Vector3(0, 0, 0), new Vector3(0, 0, 0)),
+                new Vector3(0, 0, 0));
+
+    }
+}

src/Simulation9.java

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+// Simulates the solar system.
+//
+public class Simulation9 {
+
+    // TODO: Implement the simulation using the Java-Collections framework.
+
+}

src/StateFileFormatException.java

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+import java.io.IOException;
+
+public class StateFileFormatException extends IOException {
+
+    // TODO: implement class
+
+}

src/StateFileNotFoundException.java

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+import java.io.IOException;
+
+public class StateFileNotFoundException extends IOException {
+
+    // TODO: implement class
+
+}