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Test Non-Drawing Methods

create two balloons




display information of FIRST balloon




display information of SECOND balloon



ask FIRST balloon to move ...
... and display information again



ask SECOND balloon to move ...
... and display information again

package cs1.app;

import cs1.android.*;

public class Balloon
{
    // the section for the "features/characteristics" ( the data members )
    
    private String color;
    private double size;
    private double curX;
    private double curY;
    
    // the section for the constructors
    
    public Balloon( String initColor, double initSize, double initX, double initY )
    {
        color = initColor;    // set each "feature" to what user specified
        size = initSize;
        curX = initX;
        curY = initY;
    }
    
    public Balloon( String initColor, double initSize )
    {
        color = initColor;
        size = initSize;
        curX = 0;     // default value
        curY = 0;     // default value
    }
        
    // the section for the "actions/behaviors" ( the methods )
        
    public String getColor( )
    {
        return color;
    }
   
    public double getSize( )
    {
        return size;
    }
   
    public double getX( )
    {
        return curX;
    }
   
    public double getY()
    {
        return curY;
    }
   
    public void drift( int dx, int dy )
    {
        curX = curX + dx;     // update location based
        curY = curY + dy;     // on the given amounts
    }
   
    public void draw( )
    {
        canvas.drawCircle( curX, curY, size, color );
    }

    public static void main(String[] args)
    {
        Balloon b1 = new Balloon( "red", 40, 130, 90 );   // red balloon of size 40 at (130, 90)
        Balloon b2 = new Balloon( "green", 80 );          // green balloon of size 80 at (0, 0)

        System.out.println( "balloon color: " + b1.getColor() );   // should display "red"
        System.out.println( "balloon size: " + b1.getSize() );     // should display 40
        System.out.println( "balloon x pos: " + b1.getX() );       // should display 130
        System.out.println( "balloon y pos: " + b1.getY() );       // should display 90

        System.out.println( "balloon color: " + b2.getColor() );   // should display "green"
        System.out.println( "balloon size: " + b2.getSize() );     // should display 80
        System.out.println( "balloon x pos: " + b2.getX() );       // should display 0
        System.out.println( "balloon y pos: " + b2.getY() );       // should display 0

        b1.drift( 20, -10 );

        System.out.println( "balloon x pos: " + b1.getX() );       // should display 150
        System.out.println( "balloon y pos: " + b1.getY() );       // should display 80

        b2.drift( -15, 30 );

        System.out.println( "balloon x pos: " + b2.getX() );       // should display -15
        System.out.println( "balloon y pos: " + b2.getY() );       // should display 30
    }
}