Interval

java.lang.Object
- org.graalvm.shadowed.org.antlr.v4.runtime.misc.Interval

```
public class Interval
extends Object
```
An immutable inclusive interval a..b

Field Summary

Fields
Modifier and Type Field and Description

int a

int b

static int INTERVAL_POOL_MAX_VALUE

static Interval INVALID

Fields
Modifier and Type	Field and Description
`int`	`a`
`int`	`b`
`static int`	`INTERVAL_POOL_MAX_VALUE`
`static Interval`	`INVALID`

Constructor Summary

Constructors
Constructor and Description

Interval(int a, int b)

Constructors
Constructor and Description
`Interval(int a, int b)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`adjacent(Interval other)` Are two intervals adjacent such as 0..41 and 42..42?
`Interval`	`differenceNotProperlyContained(Interval other)` Return the interval with elements from this not in other; other must not be totally enclosed (properly contained) within this, which would result in two disjoint intervals instead of the single one returned by this method.
`boolean`	`disjoint(Interval other)` Are both ranges disjoint? I.e., no overlap?
`boolean`	`equals(Object o)`
`int`	`hashCode()`
`Interval`	`intersection(Interval other)` Return the interval in common between this and o
`int`	`length()` return number of elements between a and b inclusively.
`static Interval`	`of(int a, int b)` Interval objects are used readonly so share all with the same single value a==b up to some max size.
`boolean`	`properlyContains(Interval other)`
`boolean`	`startsAfter(Interval other)` Does this.a start after other.b? May or may not be disjoint
`boolean`	`startsAfterDisjoint(Interval other)` Does this start completely after other? Disjoint
`boolean`	`startsAfterNonDisjoint(Interval other)` Does this start after other? NonDisjoint
`boolean`	`startsBeforeDisjoint(Interval other)` Does this start completely before other? Disjoint
`boolean`	`startsBeforeNonDisjoint(Interval other)` Does this start at or before other? Nondisjoint
`String`	`toString()`
`Interval`	`union(Interval other)` Return the interval computed from combining this and other

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

- Field Detail
  - INTERVAL_POOL_MAX_VALUE
```
public static final int INTERVAL_POOL_MAX_VALUE
```
    See Also:
    
    Constant Field Values
  - INVALID
```
public static final Interval INVALID
```
  - a
```
public int a
```
  - b
```
public int b
```
- Constructor Detail
  - Interval
```
public Interval(int a,
                int b)
```
- Method Detail
  - of
```
public static Interval of(int a,
                          int b)
```
    Interval objects are used readonly so share all with the same single value a==b up to some max size. Use an array as a perfect hash. Return shared object for 0..INTERVAL_POOL_MAX_VALUE or a new Interval object with a..a in it. On Java.g4, 218623 IntervalSets have a..a (set with 1 element).
  - length
```
public int length()
```
    return number of elements between a and b inclusively. x..x is length 1. if b < a, then length is 0. 9..10 has length 2.
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - startsBeforeDisjoint
```
public boolean startsBeforeDisjoint(Interval other)
```
    Does this start completely before other? Disjoint
  - startsBeforeNonDisjoint
```
public boolean startsBeforeNonDisjoint(Interval other)
```
    Does this start at or before other? Nondisjoint
  - startsAfter
```
public boolean startsAfter(Interval other)
```
    Does this.a start after other.b? May or may not be disjoint
  - startsAfterDisjoint
```
public boolean startsAfterDisjoint(Interval other)
```
    Does this start completely after other? Disjoint
  - startsAfterNonDisjoint
```
public boolean startsAfterNonDisjoint(Interval other)
```
    Does this start after other? NonDisjoint
  - disjoint
```
public boolean disjoint(Interval other)
```
    Are both ranges disjoint? I.e., no overlap?
  - adjacent
```
public boolean adjacent(Interval other)
```
    Are two intervals adjacent such as 0..41 and 42..42?
  - properlyContains
```
public boolean properlyContains(Interval other)
```
  - union
```
public Interval union(Interval other)
```
    Return the interval computed from combining this and other
  - intersection
```
public Interval intersection(Interval other)
```
    Return the interval in common between this and o
  - differenceNotProperlyContained
```
public Interval differenceNotProperlyContained(Interval other)
```
    Return the interval with elements from this not in other; other must not be totally enclosed (properly contained) within this, which would result in two disjoint intervals instead of the single one returned by this method.
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class Interval

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

INTERVAL_POOL_MAX_VALUE

INVALID

a

b

Constructor Detail

Interval

Method Detail

of

length

equals

hashCode

startsBeforeDisjoint

startsBeforeNonDisjoint

startsAfter

startsAfterDisjoint

startsAfterNonDisjoint

disjoint

adjacent

properlyContains

union

intersection

differenceNotProperlyContained

toString