Untitled
unknown
plain_text
2 years ago
12 kB
2
Indexable
Never
package labs;
import java.util.Scanner;
public class Lab01 {
public static void main(String[] args) {
problem01();
problem02();
problem03();
problem04();
problem05();
}
public static void problem01() {
//user chooses a word
Scanner inKey = new Scanner(System.in);
System.out.print("Choose a word ");
String word1 = inKey.nextLine();
//the computer prints the length of the number
System.out.println("There are " + word1.length() + " letters in " + word1) ;
}
public static void problem02() {
//user writes two different words
Scanner inKey = new Scanner(System.in);
System.out.print("Choose two word ");
//system see the words and puts them into 2 strings
String word1 = inKey.next();
String word2 = inKey.next();
//system checks if the words or same and if not says which is bigger
if (word1.length() == word2.length()) {
System.out.println("Words are the same length");
}
else if (word1.length() >= word2.length()) {
System.out.println("The longer word is " + word1);
}
else{
System.out.println("The longer word is " + word2);
}
}
public static void problem03() {
//user enters a sentence with no puncutation
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a short sentence (no punctuation) ");
String word1 = inKey.nextLine();
//computer prints sentence without first letter
System.out.println(word1.substring(1));
//computer prints sentence without last letter
System.out.println(word1.substring(0,word1.length()-1));
//computer prints sentence without first and last letter
System.out.println(word1.substring(1,word1.length()-1));
}
public static void problem04() {
//user puts a word with odd amount of letters
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a word with an odd number of characters ");
String word1 = inKey.nextLine();
//system checks if word is 1 letter only, if so prints the word out
if (word1.length() == 1) {
System.out.println(word1);
}
//if more than 1 letter and odd number system prints the 3 middle letters
else {
System.out.print("The middle three characters are \"" + word1.substring(word1.length()/2 - 1, word1.length()/2 + (2) ));
System.out.println("\"");
}
}
public static void problem05() {
//system asks user to enter a word
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a word ");
String word1 = inKey.nextLine();
//system sees if the first to letters are the same as the last
if (word1.substring(0,2).equals(word1.substring(word1.length()-2, word1.length()))) {
System.out.println("The first and last two letters are the same.");
}
else {
System.out.println("The first and last two letters are not the same.");
}
}
}
package labs;
import java.util.Scanner;
public class Lab02 {
public static void main(String[] args) {
problem01();
problem02();
problem03();
problem04();
problem05();
problem06();
}
public static void problem01() {
//user enters a word
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a word ");
String word1 = inKey.nextLine().toLowerCase();
int word = 0;
//finds how many a's are in word
String wordA = "a";
for (int i = 0; i < word1.length(); i++ ) {
if (word1.substring(i, i+1).equals(wordA)) {
word++;
}
}
//prints answer
if (word == 1) {
System.out.println("There is " + word + " a's in the word " + word1);
}
else {
System.out.println("There are " + word + " a's in the word " + word1);
}
}
public static void problem02() {
//ask user for work
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a word ");
String word1 = inKey.nextLine();
boolean wordDouble = false;
//checks if there are two letters are together that are the same
int word = 0;
for (int i = 0; i < word1.length()-1; i++ ) {
if(word1.substring(i,i+1).equals(word1.substring(i+1,i+2))) {
wordDouble = true;
}
}
//if there worddouble is true means that there are two a's and prints that it is otherwise it says there isn't
if (wordDouble == true) {
System.out.println("There is a double letter in the word " + word1);
}
else {
System.out.println("There is not a double letter in the word " + word1);
}
}
public static void problem03() {
//ask user to print a sentence
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a sentence ");
String word1 = inKey.nextLine();
//makes a's into @'s, s' to $'s e to # otherwise doesn;t change them
String wordModified = "";
for (int i = 0; i < word1.length(); i++ ) {
if (word1.substring(i,i+1).equals("a")){
wordModified +="@";
}
else if (word1.substring(i,i+1).equals("s")){
wordModified +="$";
}
else if (word1.substring(i,i+1).equals("e")){
wordModified +="#";
}
else {
wordModified += word1.substring(i,i+1);
}
}
//prints out new sentence
System.out.println(wordModified);
}
public static void problem04() {
//ask user for word
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a word ");
String word1 = inKey.nextLine();
//ask user for letter
System.out.print("Enter a letter ");
String letter = inKey.nextLine();
String letterIndex = "";
//sees how many letters are in the work
int letterNum = 0;
for (int i = 0; i < word1.length(); i++ ) {
if (word1.substring(i,i+1).equals(letter)){
letterNum++;
letterIndex += i + " ";
}
}
//prints how many there are
System.out.println("\"" +letter + "\" occurs at the following index(s): " + letterIndex );
}
public static void problem05() {
//ask user for name
Scanner inKey = new Scanner(System.in);
System.out.print("Enter your name ");
//makes all letter lowercase
String firstName = inKey.next().toLowerCase();
String lastName = inKey.next().toLowerCase();
String name = "";
//checks length of first and last name
int firstNameNum = firstName.length();
int lastNameNum = lastName.length();
int c = 0;
//prints out first letter of name caps
System.out.println(firstName.substring(0,1).toUpperCase() + firstName.substring(1, firstNameNum) + " " + lastName.substring(0,1).toUpperCase() + lastName.substring(1, lastNameNum));
//prints last letter of name in caps
System.out.println(firstName.substring(0,firstName.length()-1) + firstName.substring(firstNameNum-1, firstNameNum).toUpperCase() + " " + lastName.substring(0,lastName.length()-1) + lastName.substring(lastNameNum-1, lastNameNum).toUpperCase());
//prints every other letter caps
for (int i = 0; i < firstName.length(); i++ ) {
if (i%2==1) {
name += firstName.substring(i,i+1).toUpperCase();
c++;
}
else {
name += firstName.substring(i,i+1);
c++;
}
}
name+=" ";
for (int i = 0; i < lastName.length(); i++ ) {
if (c%2==1) {
name += lastName.substring(i,i+1).toUpperCase();
c++;
}
else {
name += lastName.substring(i,i+1);
c++;
}
}
System.out.println(name);
}
public static void problem06() {
//ask user for sentence
Scanner inKey = new Scanner(System.in);
System.out.print("Enter a sentence ");
//makes word lowercase
String word1 = inKey.nextLine().toLowerCase();
//replaces and prints all vowels to uppercase
System.out.println(word1.replaceAll("a", "A").replaceAll("e", "E").replaceAll("i", "I").replaceAll("o", "O").replaceAll("u", "U").replaceAll("y", "Y"));
}
}
package labs;
import java.util.Scanner;
public class PerformanceTask {
public static void main(String[] args) {
//ask user for password
Scanner inKey = new Scanner(System.in);
String userPassword;
String userPassword1;
//boolean for all conditions
boolean lowerCase = false;
boolean upperCase = false;
boolean number = false;
boolean special = false;
boolean same = false;
boolean length = false;
boolean notSpecial = true;
//Keeps asking for password if any boolean is false
while (!lowerCase || !upperCase || !number || !special || !same || !length || notSpecial) {
//ask user for password
System.out.print("Enter Password: ");
userPassword = inKey.nextLine();
//ask user to reenter password
System.out.print("Reenter Password: ");
userPassword1 = inKey.nextLine();
//checks if passwords are the same
if (userPassword.equals(userPassword1)) {
same = true;
}
//if they aren't the same prints the following
if (same == false) {
System.out.println("Entries don’t match");
}
//checks if password is between 8 and 20
if (userPassword.length() >= 8 && userPassword.length() <= 20) {
length = true;
}
//if false and password less than 8 prints the following...
if (length == false && userPassword.length() <8) {
System.out.println("Too short: Must be 8-20 characters");
}
//if false and password more than 20 prints the following...
if (length == false && userPassword.length() > 20) {
System.out.println("Too long: Must be 8-20 characters");
}
//check each letter for the following
for (int i=0; i<userPassword.length(); i++) {
switch(userPassword.substring(i,i+1)) {
//if password has lowercase letter
case "a": case "b": case "c": case "d": case "e":
case "f": case "g": case "h": case "i": case "j":
case "k": case "l": case "m": case "n": case "o":
case "p": case "q": case "r": case "s": case "t":
case "u": case "v": case "w": case "x": case "y":
case "z":
lowerCase=true;
break;
//if password has uppercase letter
case "A": case "B": case "C": case "D": case "E":
case "F": case "G": case "H": case "I": case "J":
case "K": case "L": case "M": case "N": case "O":
case "P": case "Q": case "R": case "S": case "T":
case "U": case "V": case "W": case "X": case "Y":
case "Z":
upperCase=true;
break;
//if password has special letter
case "!": case "@": case "#": case "$": case "%":
case "^": case "&": case "?":
special = true;
break;
//if password has number letter
case "1": case "2": case "3": case "4": case "5":
case "6": case "7": case "8": case "9": case "0":
number = true;
break;
//if password has any other characters the boolean "notSpecial" is false
default:
notSpecial = false;
}
}
//if password doesn't have a lowercase letter prints the following
if (lowerCase == false) {
System.out.println ("Must include 1 lowercase letter");
}
//if password doesn't have a uppercase letter prints the following
if (upperCase == false) {
System.out.println ("Must include 1 uppercase letter");
}
//if password doesn't have a special character prints the following
if (special == false) {
System.out.println ("Must include 1 special character (!@#$%^&*?).");
}
////if password has a none character prints the following
else if (notSpecial == false) {
System.out.println ("Unknown Character. Must include 1 special character (!@#$%^&*?).");
}
//if password doesn't have a number prints the following
if (number == false) {
System.out.println ("Must include 1 number");
}
//if all boolean true password accepted
if(length == true && number == true && upperCase == true && lowerCase == true && special == true && same == true && notSpecial == true) {
System.out.println("New Password Accepted");
break;
}
//if all boolean not true reverts all boolean to false and tries again
else {
lowerCase = false;
upperCase = false;
number = false;
special = false;
same = false;
length = false;
notSpecial = true;
}
}
}
}