javac errors

[MBD]

I am trying to compile the program below, which gives 2 errors:
<identifier> expected (lines 6 & 7)
class, interface, or enum expected (lines 9,10,11,12). Would anyone know why please?

class TwoDShape {
  private double width;
  private double height;
  private String name;
 {
    width = height = 0.0;
    name = "null";
  }
 TwoDShape(double w, double h, String n) {
    width = w; height = h;
    name = n;
  }
 TwoDShape(double x, String n) {
    width = height = x;
    name = n;
  }
 TwoDShape(TwoDShape ob) {
    width = ob.width;
    height = ob.height;
    name = ob.name;
  }
  double getWidth() { return width; }
  double getHeight() { return height; }
  void setWidth(double w) { width = w; }
  void setHeight(double h) { height = h; }
  String getName() { return name; }
  void showDim() {
    System.out.println("Width and height are " +
                       width + " and " + height);
  }
  double area() {
    System.out.println("area() must be overridden");
    return 0.0;
  }
}

class Triangle extends TwoDShape { 
    private String style;
Triangle() {
    super();
    style = "null";
  }
Triangle(String s, double w, double h) {
    super(w, h, "triangle");
    style = s;
  }
Triangle(double x) {
    super(x, "triangle");
    style = "isosceles";
  }
Triangle(Triangle ob) {
    super(ob);
    style = ob.style;
  }
double area() {
    return getWidth() * getHeight() / 2;
  }
  void showStyle() {
    System.out.println("Triangle is " + style);
  }
}
class Rectangle extends TwoDShape {
  Rectangle() {
    super();
  }
Rectangle(double w, double h) {
    super(w, h, "rectangle");
  }
Rectangle(double x) {
    super(x, "rectangle");
  }
Rectangle(Rectangle ob) {
    super(ob);
  }
  boolean isSquare() {
    if(getWidth() == getHeight()) return true;
    return false;
  }
double area() {
    return getWidth() * getHeight();
  }
}

class DynShapes {
  public static void main(String args[]) {
    TwoDShape shapes[] = new TwoDShape[5];
    shapes[0] = new Triangle("right", 8.0, 12.0);
    shapes[1] = new Rectangle(10);
    shapes[2] = new Rectangle(10, 4);
    shapes[3] = new Triangle(7.0);
    shapes[4] = new TwoDShape(10, 20, "generic");
    for(int i=0; i < shapes.length; i++) {
      System.out.println("object is " + shapes[i].getName());

      System.out.println("Area is " + shapes[i].area());
      System.out.println();
    } 
  }
}

Thanks MBD.

[JosAH]

I am trying to compile the program below, which gives 2 errors:
<identifier> expected (lines 6 & 7)
class, interface, or enum expected (lines 9,10,11,12). Would anyone know why please?

The code you've show us isn't the code you tried to compile, e.g. lines 6 and 7 are syntactically fine (although a bit strange).

kind regards,

Jos

[DiamondSoul]

Actually, the code he showed is syntactically off in that general area. There is a superfluous pair of curly braces in lines 5 and 8. MBD, I'm guessing you meant to make lines 5-8 a constructor? You just forgot the "TwoDShape()" bit before the opening curly brace.

[JosAH]

Actually, the code he showed is syntactically off in that general area. There is a superfluous pair of curly braces in lines 5 and 8. MBD, I'm guessing you meant to make lines 5-8 a constructor? You just forgot the "TwoDShape()" bit before the opening curly brace.

No, lines 5 through 8 make a fine initialization block; it isn't necessary though because member variables can be perfectly initialized when defined; but lets wait what the OP has to say ;-)

kind regards,

Jos

[Junky]

it isn't necessary though because member variables can be perfectly initialized when defined

It isn't necessary due to OP simply reassigning the default values anyway.
</nitpick>
;)