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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.

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package org.scijava.util;

/**
 * This class represents an (X, Y) coordinate pair in real coordinates. It is
 * required for high precision image coordinates translation.
 * 
 * @author Grant Harris
 * @author Curtis Rueden
 */
public class RealCoords {

	public double x;
	public double y;

	public RealCoords(final double x, final double y) {
		this.x = x;
		this.y = y;
	}

	// -- RealCoords methods --

	public int getIntX() {
		return (int) (x + 0.5);
	}

	public int getIntY() {
		return (int) (y + 0.5);
	}

	public long getLongX() {
		return (long) (x + 0.5);
	}

	public long getLongY() {
		return (long) (y + 0.5);
	}

	// -- Object methods --

	@Override
	public String toString() {
		return "[Coords: x=" + x + ",y=" + y + "]";
	}

	@Override
	public boolean equals(final Object o) {
		if (!(o instanceof RealCoords)) return false;
		final RealCoords that = (RealCoords) o;
		return x == that.x && y == that.y;
	}

	@Override
	public int hashCode() {
		// combine 16 least significant bits of x and y
		final int b1 = lsb16(x);
		final int b2 = lsb16(y);
		return b1 | (b2 << 16);
	}

	// -- Helper methods --

	private int lsb16(final double d) {
		return (int) Double.doubleToLongBits(d) & 0xffff;
	}

}