Write a recursive method, matchingParen (String str), that returns: true if str is a nesting of zero or more pairs of parentheses, like "(0)" or "(())". • false if str is null, or if str has any character other than right or left parentheses, or if the right and left parentheses do not match. System.out.println( matchingParen( ) ); System.out.println( matchingParen( "(())" ) ); System,out.println( matchingParen( "(()))" ) ); //true System.out.println( matchingParen( "((*))" ) ); System.out.println( matchingParen( "())) ) ); System.out.println( matchingParen( null ) ); //true //true //false //false //false Hint: You may check the first and last chars, and then recur on what's inside them. You may also find it easier to use a helper method.

Write a recursive method, matchingParen (String str), that returns: true if str is a nesting of zero or more pairs of parentheses, like "(0)" or "(())". • false if str is null, or if str has any character other than right or left parentheses, or if the right and left parentheses do not match. System.out.println( matchingParen( ) ); System.out.println( matchingParen( "(())" ) ); System,out.println( matchingParen( "(()))" ) ); //true System.out.println( matchingParen( "((*))" ) ); System.out.println( matchingParen( "())) ) ); System.out.println( matchingParen( null ) ); //true //true //false //false //false Hint: You may check the first and last chars, and then recur on what's inside them. You may also find it easier to use a helper method.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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