GOod

App.java

+public class App {
+    public static void main(String[] args) throws Exception {
+        System.out.println("Hello, World!");
+    }
+}

Complex.java

+public class Complex {
+
+  public double real;
+  public double imag;
+  private static double argument;
+
+  public Complex()
+  {
+    real = 0;
+    imag = 0;
+  }
+
+
+  public Complex(double r, double i)
+  {
+    real = r;
+    imag = i;
+    double d = Math.atan2(i,r);
+  }
+
+  public double imag()
+  {
+    return imag;
+  }
+
+  public double real()
+  { 
+    return real;
+  }
+
+  public double magnitude()
+  {
+    return 1.0;
+  }
+  public static void main(String[] args){
+      Complex myMag = new Complex();
+      myMag.magnitude();
+  }
+
+  public double argument()
+  {
+    return 1.0;
+  }
+  public static void main(String[] args){
+    Complex myArg = new Complex(double r, double i);
+    myArg.argument();
+  }
+
+  public String toString()
+  {
+    return "";
+  }
+  
+  public static void main(String[] args){
+    Complex myString = new Complex();
+    myString.toString("1.2 + j3.4");
+  }
+    
+
+
+
+  
+
+
+  public Complex add(Complex complexNum)
+  {
+    Complex answer = new Complex(0.0,0.0);
+
+    return answer;
+  }
+  public static void main(int) {
+    Comlpex addComplex = new Complex(r + i);
+    addComplex.Complex();
+  }
+
+
+}
\ No newline at end of file

Rectangle.java

+public class Rectangle extends Shape {
+    public Rectangle() {
+        super();
+      }
+        public Rectangle(int i) {
+        super(i);
+      }
+      
+    @Override  
+    public void draw() {
+
+    for (int loop1=0; loop1<size; loop1++){
+      for (int loop2=loop1; loop2<(size); loop2++) {
+        System.out.print(" ");
+      }
+      System.out.print("/");
+      for (int loop2=0; loop2<loop1; loop2++){
+        System.out.print("  ");
+      }
+      System.out.println("\\");
+      }
+      for (int loop1=0; loop1>size; loop1++){
+      System.out.print("--");
+      }
+      System.out.println("");
+  }
+    
+     
+      @Override
+      public float area() {
+        float fSize = size;
+        float area = fSize * fSize;
+        return area;
+      }
+    
+      @Override
+      public float circumference() {
+        float fSize = size;
+        float circ = 2 * (fSize + fSize);
+        return circ;
+      }
+    
+    }
+    
+    
+
+
+    
+

Shape.java

+abstract public class Shape {
+
+  protected int size;
+
+  abstract public void draw();
+  abstract public float area();
+  abstract public float circumference();
+
+  public int getSize() { return size; }
+  public void setSize(int size) { this.size = size; }
+  public int getWidth(int size) {return size;}
+  public int getHeight(int size) {return size;}
+
+  public Shape(){
+    this.size = 3;
+    this.size = 4;
+  }
+
+  public Shape(int size){
+    this.size = size;
+  }
+  public static void main(String[] args){
+    System.out.println();
+  }
+}

ShapeSquare.java

+public class ShapeSquare{
+    private int width;
+    private int area;
+    int sizeValue;
+    int unsizableValue;
+
+    public ShapeSquare(int value, int differentvalue){
+        sizeValue = value;
+        unsizableValue = differentvalue;
+
+    }
+
+    public static void main(String[] args) {
+        ShapeSquare mySizeSquare = new ShapeSquare(3,0);
+        System.out.println(mySizeSquare.sizeValue + mySizeSquare.unsizableValue);
+    }
+    
+}

Zoo1.java

+import java.util.ArrayList;
+public class Zoo1 {
+    public static void main (String[] args) {
+        ArrayList<String> animals = new ArrayList<String>();
+        animals.add("Cobra Snake");
+        animals.add("Lion");
+        animals.add("Hyena");
+        animals.add("Cheetah");
+        animals.add("Tiger");
+        animals.add("Dolphins");
+        animals.add("Bald eagle");
+        animals.add("Parrots");
+        System.out.println(animals.get(5) + " communicate through sound waves transmitted from their frontal lobe.");
+    }
+    
+}
+

Zoo2.java

+import java.util.ArrayList;
+public class Zoo2 {
+        public static void main (String[] args) {
+        ArrayList<String> animalsdetails = new ArrayList<String>();
+        animalsdetails.add("Cobra Snake are reptile venenous creatures that can kill you with their poison in a matter of 20 minutes ");
+        animalsdetails.add("Lion is a carnivorous mammmal most of which are native to  africa they roar all together in the pack females and males ");
+        animalsdetails.add("Hyena lie in packs that are led by females ");
+        animalsdetails.add("Cheetah are the fastest land animal tehy have more acceleration than most sports cars ");
+        animalsdetails.add("Tigers are the largest wild cat in the world and are solitary hunters ");
+        animalsdetails.add("Dolphins are intelligent like us as well eat fish and crustaceans");
+        animaldetails.add("Bald eagle can reach speed of 160km/hr ");
+        animaldetails.add("Parrots eat with their claws");
+        System.out.println(animalsdetails);
+        }
+    
+    
+    
+}

Zoo3.java

+ import java.util.ArrayList;
+ public class Zoo3 {
+     public static void main (String[] args) {
+         ArrayList<String> animaltype = new ArrayList<String>();
+         animaltype.add("Lions are mammals");
+         animaltype.add("Hyena are mammals");
+         animaltype.add("Cheetah are mammals");
+         animaltype.add("Tigers are mammals");
+         System.out.println(animaltype);
+         
+     }
+    
+}

Zoo4.java

+import java.util.ArrayList;
+public class Zoo4 {
+    public static void main (String[] args) {
+        ArrayList<String> foodtype = new ArrayList<String>();
+        foodtype.add("Cobra snakes eat mice and other types of snakes as well smaller cobra snakes. ");
+        foodtype.add("Lions eat small to medium size large hoofed animals like zebras.");
+        foodtype.add("Hyenas are scavengers that eat leftovers but also hunt for antelopes.");
+        foodtype.add("Cheetahs eat small antelopes.");
+        foodtype.add("Tigers eat large prey like deer and wild boar.");
+        foodtype.add("Dolphins eat small fish as well as squid and mackerel.");
+        foodtype.add("Bald Eagle eat fish");
+        foodtype.add("Parrots eat fresh fruits");
+        System.out.println(foodtype);
+        
+
+    }
+    
+}

Zoo5.java

+import java.util.ArrayList;
+public class Zoo5 {
+    public static void main (String[] args) {
+        ArrayList<String> animalsenvironment = new ArrayList<String>();
+        animalsenvironment.add("Cobra snakes are form the sub-saharan africa");
+        animalsenvironment.add("Lions are from the sub-saharan africa");
+        animalsenvironment.add("Hyenas are from the sub- saharan africa");
+        animalsenvironment.add("Cheetahs are from the sub-saharan africa");
+        System.out.println(animalsenvironment);
+    }
+
+}

bankaccount.java

+
+    public class bankaccount {
+        // bank account attributes
+        static int accountSerialNumber;
+        static String accountName;
+        double balance;
+     
+        // contructor method
+        public bankaccount() {
+            accountSerialNumber = 12345;
+            accountName = "Ben";
+            balance = 2100;
+        }
+     
+        // deposit method
+        public void deposit(double amount) {
+            balance = balance + amount;
+        }
+     
+        // withdraw method
+        public void withdraw(double amount) {
+            if (amount <= balance) {
+                balance = balance - amount;
+                // overdraft method
+            } else if (amount > balance && balance > -100) {
+                System.out.println("Overdraft limit reached.");
+                balance = -100;
+            }
+        }
+     
+        // bank fee method
+        public double bankFee() {
+            double fee = balance * .05;
+            balance = balance - fee;
+            return balance;
+        }
+     
+        // display method
+        public void displayAccountDetails() {
+            System.out.println("Account Number: " + accountSerialNumber + "\n");
+            System.out.println(accountName + ": $" + balance);
+        }
+     
+        public static void main(String[] args) {
+            bankaccount bensAccount = new bankaccount();
+            bensAccount.deposit(200);
+            bensAccount.bankFee();
+            bensAccount.withdraw(2000);
+            bensAccount.displayAccountDetails();
+        }
+    }
+    
+}

savingAccount.java

+
+    public class savingAccount {
+        // bank account attributes
+        static int accountSerialNumber;
+        static String accountName;
+        double balance;
+     
+        // contructor method
+        public savingAccount() {
+            accountSerialNumber = 12345;
+            accountName = "Ben";
+            balance = 2100;
+        }
+     
+        // deposit method
+        public void deposit(double amount) {
+            balance = balance + amount;
+        }
+     
+        // withdraw method
+        public void withdraw(double amount) {
+            if (amount <= balance) {
+                balance = balance - amount;
+            } else {
+                System.out.print("Insufficient Funds");
+            }
+        }
+     
+        // bank fee method
+        public double bankFee() {
+            double fee = balance * .05;
+            balance = balance - fee;
+            return balance;
+        }
+     
+        // display method
+        public void displayAccountDetails() {
+            System.out.println("Account Number: " + accountSerialNumber + "\n");
+            System.out.println(accountName + ": $" + balance);
+        }
+     
+        // interest method
+        public int accrueInterest() {
+            int interest = (int) (balance * .05);
+            balance = balance + interest;
+            return (int) balance;
+        }
+     
+        public static void main(String[] args) {
+            savingAccount bensAccount = new savingAccount();
+            bensAccount.deposit(200);
+            bensAccount.withdraw(50);
+            bensAccount.accrueInterest();
+            bensAccount.bankFee();
+            bensAccount.displayAccountDetails();
+        }
+    }
+    
+}