Initializes a two-dimensional interval. @param x the one-dimensional interval of x-coordinates @param y the one-dimensional interval of y-coordinates

Initializes an empty priority queue with the given initial capacity. @param initCapacity the initial capacity of this priority queue

Initializes an output stream from a {@link OutputStream}. @param os the {@code OutputStream}

Initializes a particle with the specified position, velocity, radius, mass, and color. @param rx <em>x</em>-coordinate of position @param ry <em>y<

Initializes a blank {@code width}-by-{@code height} picture, with {@code width} columns and {@code height} rows, where each pixel is black. @param wi

Initializes a new point (x, y). @param x the x-coordinate @param y the y-coordinate @throws IllegalArgumentException if either {@code x} or {@code y}

Initializes an empty queue.

Returns the number of characters in this alphabet (the radix). @return the number of characters in this alphabet @deprecated Replaced by {@link #radi

Initializes an empty set.

Initializes an empty symbol table.

Initializes an empty stack.

This method cannot be called directly.

This method cannot be called directly.

Opens a save dialog box when the user selects "Save As" from the menu.

Adds a {@link DrawListener} to listen to keyboard and mouse events. @param listener the {\tt DrawListener} argument

Returns twice the signed area of the triangle a-b-c. @param a first point @param b second point @param c third point @return twice the signed area of

Compares two points by atan2() angle (between -pi and pi) with respect to this point. @return the comparator

Updates the velocities of this particle and the specified particle according to the laws of elastic collision. Assumes that the particles are collidin

Updates the velocity of this particle upon collision with a horizontal wall (by reflecting the velocity in the <em>y</em>-direction). Assumes that the

Updates the velocity of this particle upon collision with a vertical wall (by reflecting the velocity in the <em>x</em>-direction). Assumes that the p

Returns a random real number from the Cauchy distribution. @return a random real number from the Cauchy distribution.

Returns the smallest key in this symbol table greater than or equal to {@code key}. @param key the key @return the smallest key in this symbol table

Flush and close standard output. Once standard output is closed, you can no longer write bits to it.

Closes standard output.

Close this input stream and release any associated system resources.

Compares this counter to the specified counter. @param that the other counter @return {@code 0} if the value of this counter equals the valu

Returns true if this interval contains the specified value. @param x the value @return {@code true} if this interval contains the value {@code x};

Returns true if the argument is a character in this alphabet. @param c the character @return {@code true} if {@code c} is a character in this alphab

Returns the number of collisions involving this particle with vertical walls, horizontal walls, or other particles. This is equal to the number of cal

Decrease the key associated with index {@code i} to the specified value. @param i the index of the key to decrease @param key decrease the key asso

Remove the key associated with index {@code i}. @param i the index of the key to remove @throws IndexOutOfBoundsException unless {@code 0 <= i < max

Removes the specified key from this set (if the set contains the specified key). @param key the key @throws IllegalArgumentException if {@code key}

Removes the specified key and its associated value from this symbol table (if the key is in this symbol table). @param key the key @throws IllegalAr

Disable double buffering. All subsequent calls to drawing methods such as {@code line()}, {@code circle()}, and {@code square()} will be displayed on

Returns the Euclidean distance between this point and that point. @param that the other point @return the Euclidean distance between this point and th

Compares two points by distance to this point. @return the comparator

Draws this particle to standard draw.

Draws an ellipse with the specified semimajor and semiminor axes, centered at (<em>x</em>, <em>y</em>). @param x the <em>x</em>-coordinate of the ce

Draws an ellipse with given semimajor and semiminor axes, centered on (x, y). @param x the x-coordinate of the center of the ellipse @param y the y

Compares this transaction to the specified object. @param other the other interval @return {@code true} if this interval equals the other interval;