Добавлена первое, второе и часть третьего задания ЛР №2

src/tse/LR_2.java

@@ -1,5 +1,8 @@
 package tse;
 
+import tse.lr2.CompareArrays1D;
+import tse.lr2.CompareArrays2D;
+
 /**
  * @author aNNiMON
  */
@@ -17,10 +20,10 @@ public class LR_2 implements ILabRab {
     public void execute(int index) {
         switch(index) {
             case 0:
-                
+                CompareArrays1D.main();
                 break;
             case 1:
-                
+                CompareArrays2D.main();
                 break;
             case 2:
                 
@@ -41,7 +44,7 @@ public class LR_2 implements ILabRab {
 
     @Override
     public String getDescription(int index) {
-        return Util.readDescription(1, index);
+        return Util.readDescription(2, index);
     }
     
 }

src/tse/Main.java

@@ -44,7 +44,7 @@ public class Main extends JFrame {
     }
     
     private final ILabRab[] labs = new ILabRab[] {
-        new LR_1()
+        new LR_1(), new LR_2()
     };
     
     private JButton executeButton;

src/tse/lr2/Circle.java

@@ -0,0 +1,18 @@
+package tse.lr2;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Circle extends Ellipse {
+
+    public boolean isConsist() {
+        return false;
+    }
+    
+    @Override
+    public String toString() {
+        return "This is circle!\n" + super.toString();
+    }
+    
+}

src/tse/lr2/CompareArrays1D.java

@@ -0,0 +1,44 @@
+package tse.lr2;
+
+import java.util.Arrays;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class CompareArrays1D {
+
+    public static void main() {
+        String[] a = {"1","2","3"};
+        String[] b1 = a;
+        String[] b2 = a.clone();
+        String[] b3 = Arrays.copyOf(a, a.length);
+        String[] b4 = {"1","2","3"};
+        
+        printRow("b=a\t\t\t", getValues(a, b1));
+        printRow("b=a.clone()\t\t", getValues(a, b2));
+        printRow("b=Arrays.copyOf(a)\t", getValues(a, b3));
+        printRow("b4 = {\"1\",\"2\",\"3\"}\t", getValues(a, b4));
+        
+    }
+
+    private static void printRow(String col1, boolean[] values) {
+        System.out.println();
+        System.out.print(col1 + "\t");
+        for (boolean val : values) {
+            System.out.print(val + "\t");
+        }
+    }
+
+    private static boolean[] getValues(String[] a, String[] b) {
+        boolean[] values = new boolean[] {
+            b == a,
+            b.equals(a),
+            Arrays.equals(a, b),
+            Arrays.deepEquals(a, b),
+            b[0] == a[0]
+        };
+        
+        return values;
+    }
+}

src/tse/lr2/CompareArrays2D.java

@@ -0,0 +1,43 @@
+package tse.lr2;
+
+import java.util.Arrays;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class CompareArrays2D {
+
+    public static void main() {
+        String[][] a = { {"1","2","3"}, {"4", "5", "6"}, {"7", "8", "9"}};
+        String[][] b1 = a;
+        String[][] b2 = a.clone();
+        String[][] b3 = Arrays.copyOf(a, a.length);
+        String[][] b4 = { {"1","2","3"}, {"4", "5", "6"}, {"7", "8", "9"}};
+        
+        printRow("b=a\t\t\t", getValues(a, b1));
+        printRow("b=a.clone()\t\t", getValues(a, b2));
+        printRow("b=Arrays.copyOf(a)\t", getValues(a, b3));
+        printRow("b4 = {\"1\",\"2\",\"3\"}, {\"4\",\"5...", getValues(a, b4));
+    }
+
+    private static void printRow(String col1, boolean[] values) {
+        System.out.println();
+        System.out.print(col1 + "\t");
+        for (boolean val : values) {
+            System.out.print(val + "\t");
+        }
+    }
+
+    private static boolean[] getValues(String[][] a, String[][] b) {
+        boolean[] values = new boolean[] {
+            b == a,
+            b.equals(a),
+            Arrays.equals(a, b),
+            Arrays.deepEquals(a, b),
+            b[0] == a[0]
+        };
+        
+        return values;
+    }
+}

src/tse/lr2/Ellipse.java

@@ -0,0 +1,78 @@
+package tse.lr2;
+
+import java.awt.Point;
+import java.util.Arrays;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class Ellipse {
+    
+    private static final int POINTS = 4;
+    
+    protected final Point[] points;
+
+    public Ellipse() {
+        points = new Point[POINTS];
+    }
+
+    public Ellipse(Point p1, Point p2, Point p3, Point p4) {
+        points = new Point[] {
+            p1, p2, p3, p4
+        };
+    }
+    
+    public Ellipse(Ellipse ellipse) {
+        points = Arrays.copyOf(ellipse.points, POINTS);
+    }
+    
+    public Point getCenterPoint() {
+        int cx = (points[1].x - points[0].x) / 2  + points[0].x;
+        int cy = (points[2].y - points[0].y) / 2 + points[0].y;
+        Point center = new Point(cx, cy);
+        return center;
+    }
+    
+    public double getSquare() {
+        Point center = getCenterPoint();
+        double hor = center.x - points[0].x;
+        double ver = center.y - points[0].y;
+        return Math.PI * hor * ver;
+    }
+    
+    public double getDistanceOfCentres(Ellipse ellipse) {
+        return (getCenterPoint().distance(ellipse.getCenterPoint()));
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof Ellipse) {
+            Ellipse ellipse = (Ellipse) obj;
+            return (ellipse.points).equals(obj);
+        }
+        return super.equals(obj); 
+    }
+
+    @Override
+    protected Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    @Override
+    public int hashCode() {
+        return super.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < POINTS; i++) {
+            sb.append(points[i].toString()).append('\t');
+        }
+        sb.append("\nSquare: ").append(getSquare());
+        sb.append("\nCenter: ").append(getCenterPoint().toString());
+        return sb.toString();
+    }
+    
+}