Fundamentals of Java functions

Package dubeg02; Trapezoid area

public class Tast {
public static int Add (int a, int b, int c) {
int D = (A + b) * C/2;
ToString (A, B, c);
return D;
}

public static void toString (int a, int b, int c) {
System.out.println ("Long" + a);
System.out.println ("width" + b);
System.out.println ("high" + C);
}

public static void Main (string[] args) {
int a = 22;
int b = 15;
int c = 17;
int sum = Add (A, B, c);
System.out.println ("trapezoid area" + sum);
}
}

Package dubeg02; Rectangular area//

public class Tast01 {
public static int Add (int a, int b) {
int C = a*b;
ToString (A, b);
return C;
}

public static void toString (int a, int b) {
System.out.println ("Long" + a);
System.out.println ("width" + b);
}

public static void Main (string[] args) {
int a = 13;
int b = 999;
int sum = Add (a, b);
System.out.println ("rectangular area" + sum);
}
}

Package dubeg02; triangular area//

public class Tast03 {
public static int Add (int a, int b) {
int C = A*B/2;
ToString (A, b);
return C;
}

public static void toString (int a, int b) {
System.out.println ("Long" + a);
System.out.println ("width" + b);
}

public static void Main (string[] args) {
int a = 1234;
int b = 5678;
int sum = Add (a, b);
System.out.println ("triangular area" + sum);
}
}

Package dubeg02; Circle Area//

public class Tast04 Circle {
public static int Add (int r) {
int b= (int) (MATH.PI*R*R);
ToString (R);
return b;
}
public static void toString (int r) {
System.out.println ("radius" +r);
}
public static void Main (string[] args) {
int r= 123;
int sum= Add (r);
System.out.println ("Round area" +sum);

}
}

Fundamentals of Java functions