Write a test class to test the methods length, charAt, substring, and indexOfin the java.lang.String class.

Write a java class method named addQuotes that takes one parameter of type String. The method should return a string that's indentical to it's argument, but with a double quote character added at the beginning and end of the string.

Write the following programs in Java: In the Converter class write the static method, bin2decimal(String bin). The parameter for this method is an unsigned (nonnegative) binary number represented by a string. The method returns the decimal equivalent for the binary parameter, as an integer.If the binary string is invalid (contains characters other than ‘0’ and ‘1’), the method returns -1. Convert from a binary (b) string with up to 16 digits to decimal (d) using the following formula:? = ?0 + ?1 × 2 + ?2 × 22 +⋯+ ?7 × 215where b0, b1, ?2, … ?7 are the binary digits in order of increasing significance. For example, 1101 is: 1 + 0×2 + 1×22 + 1×23 = 13 in decimal. Side note: You may NOT use the decode method of the Long wrapper class instead of this formula.   In the Converter class write another static method, english2encrypted(String english). The parameter for this method is a word or sentence represented by a string. The word or sentence should only contain letters (no digits,…

java Write a public static method named getStringReversed that takes in 1 argument of type String and returns the String in reverse order.

Refactor the following code using the concept of functions. a = 2 b = 3 C= 4 d = 5 a = 2 b = 3 C= 4 d = 5

hello how are you? can you Please code  this  in Java .. dont use advanced coding and dont edit the whole code and only start editing from where it is menthioned in the code. Please follow the instructions as it is and please see that the input and output are exactly as same as provided in the image. thank you. Write a program that reads a list of integers from input and determines if the list is a palindrome (values are identical from first last to first and last to first). The input begins with an integer indicating the length of the list that follows. Assume that the list will always contain fewer than 20 integers. Output 'yes" if the list is a palindrome and "no' otherwise. The output ends with a newline.

For Java Write  code for an if-else block that checks separates integers into the following categories: An integer less than 0, An integer greater than 0 and less than or equal to 10, An integer greater than 10 that is even, and an integer greater than 10 that is odd. Have each category print out a different statement. What are some ways you can make your code more efficient when using if-else blocks?

In Java intellej    Correct this code and add the following  1.Correct: (The error shows a problem under () next to "firstBeachShoot.printPhotoDetails")   2.Add the following to the second package (screenshot):  1.for or for...each or while loops. 2.Arrays 3.default, no-args and parameterized constructors.     Here's the first package : import java.util.Scanner;public class Image {int numberOfPhotos; // photos on rolldouble fStop; // light let it 1.4,2.0,2.8 ... 16.0int iso; // sensativity to light 100,200, 600int filterNumber; // 1-6String subjectMatter;String color; // black and white or colorString location;boolean isblurry;public String looksBlurry(boolean key) {if (key == true) {return "Photo is Blurry";} else {return "Photo is Clear";}}public void printPhotoDetails(String s1) {Scanner br = new Scanner(System.in);String subjectMatter = s1;System.out.println("Data of Nature photos:");System.out.println("Enter number of photos:");numberOfPhotos = br.nextInt();int i = 1;while…

This is the code: String name = Doe, John"; int index =name.indexOf(" , "); String firstName= name.substring(index + 2, name.length()); System.out.println(firstName);

Write in JAVA