The following pseudocode describes how to obtain the name of a day, given the day number (0 = Sunday, 1 = Monday, and so on.)

Declare a string called names containing "SunMonTueWedThuFriSat". Compute the starting position as 3 x the day number. Extract the substring of names at the starting position with length 3.

Check this pseudocode, using the day number 4. Draw a diagram of the string that is being computed, similar to Figure 5 (See BJLO: Chapter 2, Section 2.5.6 (Substrings)). Suppose you are given a string str and two positions i and j, where i comes before j. The following pseudocode describes how to swap two letters in a word.

We are given a string str and two positions i and j. (i comes before j) Set first to the substring from the start of the string to the last position before i. Set middle to the substring from positions i + 1 to j - 1. Set last to the substring from position j + 1 to the end of the string. Concatenate the following five strings: first, the string containing just the character at position j, middle, the string containing just the character at position i, and last.

Check this pseudocode, using the string "Gateway" and positions 2 and 4. Draw a diagram of the string that is being computed, similar to Figure 5 (See BJLO: Chapter 2, Section 2.5.6 (Substrings)).

Write Java code that transforms numbers 1, 2, 3, , 12 into the corresponding month names January, February, March, , December. Hint: Make a very long string "January February March ...", in which you add spaces such that each month name has the same length. Then use substring to extract the month you want.

What is the output produced by the following?

String verbPhrase = "is money"; System.out.println("Time" + verbPhrase);

What is the output produced by the following?

String test = "abcdefg"; System.out.println(test.length()); System.out.println(test.charAt(1));

What is the output produced by the following?

String test = "abcdefg"; System.out.println(test.substring(3,5));