Angle

java.lang.Object
- physics.Angle

All Implemented Interfaces:

java.lang.Comparable<Angle>
```
public final class Angle
extends java.lang.Object
implements java.lang.Comparable<Angle>
```
Angle is an immutable abstract data type which represents the mathematical notion of an angle. Angle represents a non-negative angle less than 360 degrees or 2*pi radians.

Field Summary

Fields
Modifier and Type	Field and Description
`static Angle`	`DEG_135` A 135-degree angle
`static Angle`	`DEG_180` A 180-degree angle
`static Angle`	`DEG_225` A 225-degree angle
`static Angle`	`DEG_270` A 270-degree angle
`static Angle`	`DEG_315` A 315-degree angle
`static Angle`	`DEG_45` A 45-degree angle
`static Angle`	`DEG_90` A 90-degree angle
`static Angle`	`RAD_PI` An angle of pi radians
`static Angle`	`RAD_PI_OVER_FOUR` An angle of pi/4 radians
`static Angle`	`RAD_PI_OVER_TWO` An angle of pi/2 radians
`static Angle`	`ZERO` A zero-degree or zero-radian angle

Constructor Summary

Constructors
Constructor and Description

Angle(double radians)
Constructs an Angle with radians radians.

Angle(double x, double y)

Constructors
Constructor and Description
`Angle(double radians)` Constructs an `Angle` with `radians` radians.
`Angle(double x, double y)`

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`compareTo(Angle c)` Compares this object with the specified object for order.
`double`	`cos()`
`boolean`	`equals(Angle a)`
`boolean`	`equals(java.lang.Object o)`
`int`	`hashCode()`
`Angle`	`minus(Angle a)`
`Angle`	`plus(Angle a)`
`double`	`radians()`
`double`	`sin()`
`double`	`tan()`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - ZERO
```
public static final Angle ZERO
```
    A zero-degree or zero-radian angle
  - DEG_45
```
public static final Angle DEG_45
```
    A 45-degree angle
  - DEG_90
```
public static final Angle DEG_90
```
    A 90-degree angle
  - DEG_135
```
public static final Angle DEG_135
```
    A 135-degree angle
  - DEG_180
```
public static final Angle DEG_180
```
    A 180-degree angle
  - DEG_225
```
public static final Angle DEG_225
```
    A 225-degree angle
  - DEG_270
```
public static final Angle DEG_270
```
    A 270-degree angle
  - DEG_315
```
public static final Angle DEG_315
```
    A 315-degree angle
  - RAD_PI_OVER_FOUR
```
public static final Angle RAD_PI_OVER_FOUR
```
    An angle of pi/4 radians
  - RAD_PI_OVER_TWO
```
public static final Angle RAD_PI_OVER_TWO
```
    An angle of pi/2 radians
  - RAD_PI
```
public static final Angle RAD_PI
```
    An angle of pi radians
- Constructor Detail
  - Angle
```
public Angle(double radians)
```
    Constructs an Angle with radians radians.
  - Angle
```
public Angle(double x,
     double y)
```
    Parameters:
    x - ; requires that (x,y) != (0,0)
    y - ; requires that (x,y) != (0,0) Constructs the Angle that is formed between the positive x-axis and the line from the origin to (x, y).
- Method Detail
  - cos
```
public double cos()
```
    Returns:
    the cosine of this.
  - sin
```
public double sin()
```
    Returns:
    the sine of this.
  - tan
```
public double tan()
```
    Returns:
    the tangent of this.
  - radians
```
public double radians()
```
    Returns:
    the number of radians represented by this in the range of -pi to pi.
  - compareTo
```
public int compareTo(Angle c)
```
    Compares this object with the specified object for order.
    
    Specified by:
    
    compareTo in interface java.lang.Comparable<Angle>
    
    Returns:
    a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.
    
    Throws:
    
    java.lang.NullPointerException - if c is null
  - plus
```
public Angle plus(Angle a)
```
    Parameters:
    a - angle to add to; requires that a is not null
    
    Returns:
    the angle this + a.
  - minus
```
public Angle minus(Angle a)
```
    Parameters:
    a - angle to subtract from; requires that a is not null
    
    Returns:
    the angle this - a.
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - equals
```
public boolean equals(Angle a)
```
  - equals
```
public boolean equals(java.lang.Object o)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object

Class Angle

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ZERO

DEG_45

DEG_90

DEG_135

DEG_180

DEG_225

DEG_270

DEG_315

RAD_PI_OVER_FOUR

RAD_PI_OVER_TWO

RAD_PI

Constructor Detail

Angle

Angle

Method Detail

cos

sin

tan

radians

compareTo

plus

minus

toString

equals

equals

hashCode