10) Consider the method below. This method will return TRUE if and only if which of the following is true?: * public boolean check (String str) { } return str.length() >= 2 && (str.charAt(1) == str.charAt(0) || check (str.substring (1))); A) str contains two or more of the same character in a row B) str ends with two or more of the same characters C) str contains two or more of the same characters D) str starts with two or more of the same characters E) str.charAt(0) == str.charAt(1)

10) Consider the method below. This method will return TRUE if and only if which of the following is true?: * public boolean check (String str) { } return str.length() >= 2 && (str.charAt(1) == str.charAt(0) || check (str.substring (1))); A) str contains two or more of the same character in a row B) str ends with two or more of the same characters C) str contains two or more of the same characters D) str starts with two or more of the same characters E) str.charAt(0) == str.charAt(1)

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

See similar textbooks

Similar questions

Write a test class to test the methods length, charAt, substring, and indexOfin the java.lang.String class.
Exercise 3.8 >The following method returns the longest substring that appears at both the beginning and the end of the string without overlap. For example, sameEnds("abXab") returns "ab". public class SameEnds { public String sameEnds(String string) { int length = string.length(); int half = length / 2; String left = ""; String right = ""; int size = 0; for (int i = 0; i < half; i++) { left = left + string.charAt(i); right = string.charAt(length - 1 - i) + right; if (left.equals(right)) { size = left.length(); } } return string.substring(0, size); } } This is a software testing exercise. Apply the domain testing to the above program. Clearly state all steps of domain testing. Thank you so much.
‏1-Write the pseudocode for this method ‏2-Flowchart for this method ‏public static void bucketSort(int[] arr) { ‏ int max_value = 0; ‏ for (int i = 0; i < arr.length; i++) ‏ if (arr[i] > max_value) ‏ max_value = arr[i]; ‏ int[] bucket = new int[max_value + 1]; ‏ for (int i= 0; i
write a public static method named replaceFirst that takes in a String s and a char c as arguments. The method will return a modified String replacing the first character with the one that was passed in. (Do not print out the String) Special cases: If s is null, the method should return null. If s is the blank string, “”, the method should return the blank string. Example: Replace.replaceFirst(“make”, ‘t’); Returns: “take” Replace.replaceFirst(“a”, ‘x’); Returns: “x” Java tests: Test replaceFirst(null, char c) replaceFirst("", char c)keyboard_arrow_up replaceFirst(String s, char c)Unit testkeyboard_arrow_down
basic java please Write a method starTheString that accepts a string of any size/length and a number. It should then return a new string that is two copies of the string with a set of stars between them equal to the number. For example, the call of starTheString("Hello", 5) o would return "*****Hello*****" 5 stars - Hello - 5 Stars starTheString ("Goodbye", 3) o would return "***Goodbye***" 3 stars – Goodbye - 3 Stars
U is upward, D is downward, L is left and R is right : Using the methods pickDir() and exractInt() as shown below, to write a simple automated game: how long does it take a robot to travel from a left line of a field to the right line? Assume field is 15 units apart (meters, kilometers, it doesn’t matter), and the robot starts on the left line. pickDir(): // return string with random direction and random distance (within maxDist) public static String pickDir (int maxDist) { Random r = new Random(); // random number generator // return direction + distance return ( "" + "LRUD".charAt( r.nextInt(4) ) + (r.nextInt(maxDist) + 1) ); } extractInt(): // returns integer from string, from pos p1 to p2: str = "D1" – extractInt(str,1,1); public static int extractInt (String str, int p1, int p2) { return ( Integer.parseInt( str.substring(p1, p2+1) ) ); } Write the main() method that keeps looping until the robot’s random left…
how would you change the test method of the palindrome class so that it considerer all character, not just letters? please identify the statements you would change, and how you would change them: public class Palindrome { public static boolean test(String candidate) // Returns true if candidate is a palindrome, false otherwise. { char ch; // current candidate character being processed int length; // length of candidate string char fromStack; // current character popped from stack char fromQueue; // current character dequeued from queue boolean stillPalindrome; // true if string might still be a palindrome StackInterface<Character> stack; // holds non blank string characters QueueInterface<Character> queue; // also holds non blank string characters // initialize variables and structures length = candidate.length(); stack = new ArrayBoundedStack<Character>(length);…
Write a recursive method that displaysa string reversely on the console using the following header: public static void reverseDisplay(String value) For example, reverseDisplay("abcd") displays dcba. Write a test programthat prompts the user to enter a string and displays its reversal.
3. how can reverse numbers in a string when they are split with "-"? It has to be in java, manually, no imports allowed, although we are allowed to use only methods/functions from the String class. please explain too so I can study!<3 example:input: 3-1, 4, 5, 6-9output: 1-3, 4, 5, 6-9another example: input: 1-6, 8, 9-12, 16-13, 17output expected: 1-6, 8, 9-12, 13-16, 17
The String class is provided in the Java library.Provide your own implementation for the following methods (name the newclass MyString2):public MyString2(String s);public int compare(String s);public MyString2 substring(int begin);public MyString2 toUpperCase();public char[] toChars();public static MyString2 valueOf(boolean b);
Identify the method stub in the following code: public class VoltageCalc { private int inCurrent; private double inResistance; public void setValues(int i, double r) { inCurrent = i; inResistance = r; } public int getVoltage() { System.out.println("FIXME: Calc Voltage");return 0;} public static void main(String [] args) { VoltageCalc myCircuit = new VoltageCalc(); myCircuit.setValues(4, 3.15); } } Group of answer choices public void setValues(int i, double r) {...} public class VoltageCalc {...} public int getVoltage() {...} public static void main(String [] args) {...} Next
Print person1's kids, call the incNumKids() method, and print again, outputting text as below. End each line with a newline.Sample output for below program with input 3: Kids: 3 New baby, kids now: 4 // ===== Code from file PersonInfo.java =====public class PersonInfo {private int numKids; public void setNumKids(int setPersonsKids) {numKids = setPersonsKids;} public void incNumKids() {numKids = numKids + 1;} public int getNumKids() {return numKids;}}// ===== end ===== // ===== Code from file CallPersonInfo.java =====import java.util.Scanner; public class CallPersonInfo {public static void main(String [] args) {Scanner scnr = new Scanner(System.in);PersonInfo person1 = new PersonInfo();int personsKid; personsKid = scnr.nextInt(); person1.setNumKids(personsKid); /* Your solution goes here */ }}// ===== end =====