# 
#  What is `checkFromToIndex`?

The **`checkFromToIndex` method** is a #key# static: declared using the "static" keyword. These methods can be invoked without the need for creating an instance of a class. #key# method of the `Objects` class.

This method is used to check whether the sub-range from the input `fromIndex` to the input `toIndex` is within bounds of `zero` and the input `length`.

The `fromIndex`, `toIndex`, and `length` are passed as arguments to the method.

# 
## Exceptions in `checkFromToIndex`

The method throws the `IndexOutOfBoundsException` exception if any of the following conditions are true.

1. The `fromIndex` is less than zero.

2. The `toIndex` is less than zero.

3. The `length` is less than zero.

4. The `fromIndex` is greater than `toIndex`.

5. The `toIndex` is greater than `length`.

>This method was introduced in Java 9. 

##
## Required module
To use the `checkFromToIndex` method, import the following module:

---
```
java.util.Objects
```

#  
#  Syntax
---
``` Java
public static int checkFromToIndex(int fromIndex, int toIndex, int length)
```
---

# 
## Parameters

* `int fromIndex` - the lower bound of the sub-range.
 
* `int toIndex` - the upper bound of the sub-range.

* `int length` - the upper bound of the range.

##
## Return type

The method returns the `fromIndex` value if the sub-range is within bounds of zero to `length`.

# 
## Code
## 
### Example 1

The code below prints the `fromIndex` value because the sub-range is within the zero to `length` range.

import java.util.Objects;

public class Main {
    public static void main(String[] args) {
        int fromIndex = 5;
        int toIndex = 9;
        int length = 15;
        System.out.println(Objects.checkFromToIndex(fromIndex, toIndex, length));
    }
}


## 
### Explanation 1

We have imported class `Objects` from `java.util` and called the method `checkFromToIndex()` using the `Objects` class.

The method takes input from three parameters as declared from line 5 to line 7.

The program returns `5` as output and exits.

## 
### Example 2

The code below throws `IndexOutOfBoundsException` because the `toIndex` value is greater than the `length` value.

import java.util.Objects;

public class Main {
    public static void main(String[] args) {
        int fromIndex = 5;
        int toIndex = 18;
        int length = 15;
        System.out.println(Objects.checkFromToIndex(fromIndex, toIndex, length));
    }
}


## 
### Explanation 2

As defined earlier in the shot, if `toIndex` is greater than `length`, the program will throw an `IndexOutOfBoundsException`.

What is Objects.checkFromToIndex in Java?

Checks if sub-range from `fromIndex` to `toIndex` is within 0 and `length`. Throws IndexOutOfBoundsException if condition fails.

What is Objects.checkFromToIndex in Java?

What is `checkFromToIndex`?

Exceptions in `checkFromToIndex`

Required module

Syntax

Parameters

Return type

Code

Example 1

Result

Explanation 1

Example 2

Result

Explanation 2

What is Objects.checkFromToIndex in Java?

What is checkFromToIndex?

Exceptions in checkFromToIndex

Required module

Syntax

Parameters

Return type

Code

Example 1

Result

Explanation 1

Example 2

Result

Explanation 2

What is `checkFromToIndex`?

Exceptions in `checkFromToIndex`