• I need to implement the following methods for a project
• getArrayString

public staticjava.lang.StringgetArrayString(int[]array, charseparator) 

• Return a string where each array entry (except the last one) is followed by the specified separator. An empty string will be return if the array has no elements.
• Parameters:
• array-
• separator-
• Returns:
• string
• Throws:
• java.lang.IllegalArgumentException- When a null array parameter is provided
• getInstances

public staticintgetInstances(int[]array, intlowerLimit, intupperLimit) 

• Returns the number of values that are in the range defined by lowerLimit (inclusive) and upperLimit (inclusive).
• Parameters:
• array-
• lowerLimit-
• upperLimit-
• Returns:
• number of values in range
• Throws:
• java.lang.IllegalArgumentException- When a null array parameter is provided
• filter

public staticint[]filter(int[]array, intlowerLimit, intupperLimit) 

• Returns a new array with values in array that exists in the range defined by lowerLimit (inclusive) and upperLimit (inclusive).
• Parameters:
• array-
• lowerLimit-
• upperLimit-
• Returns:
• array with values in range
• Throws:
• java.lang.IllegalArgumentException- When a null array parameter is provided
• java.lang.IllegalArgumentException- When lowerLimit is greater than upperLimit
• rotate

public staticvoidrotate(int[]array, booleanleftRotation, intpositions) 

• Rotates the provided array left if leftRotation is true; right otherwise. The number of positions to rotate is determined by positions. For example, rotating the array 10, 20, 7, 8 two positions to the left will update the array to 7, 8, 10, 20. Only arrays with 2 or more elements will be rotated. Hint: adding private methods that rotate an array one position to the left and one position to the right can help.
• Parameters:
• array-
• leftRotation-
• positions-
• Throws:
• java.lang.IllegalArgumentException- When a null array parameter is provided
• getArrayStringsLongerThan

public staticjava.lang.StringBuffer[]getArrayStringsLongerThan(java.lang.StringBuffer[]array, intlength) 

• Returns a StringBuffer array with COPIES of StringBuffer objects in the array parameter that have a length greater than the length parameter. If no strings are found an empty array will be returned.
• Parameters:
• array-
• length-
• Returns:
• Throws:
• java.lang.IllegalArgumentException- When a null array parameter is provided