Conditional Execution - Building Java Programs: A Back to Basics Approach - page 239

if (s.equals("yes")) {
processYes();
} else if (s.equals("no")) {
processNo();
} else {
System.out.println("You didn't type yes or no");
}
Remember when you're working with strings that you should always call the
equals method rather than using == .
The String class also has a special variation of the equals method called
equalsIgnoreCase that ignores case differences (uppercase versus lowercase letters).
For example, you could rewrite the preceding code as follows to recognize responses
like “Yes,” “YES,” “No,” “NO,” yES”, and so on:
System.out.print("yes or no? ");
String s = console.next();
if (s.equalsIgnoreCase("yes")) {
processYes();
} else if (s.equalsIgnoreCase("no")) {
processNo();
} else {
System.out.println("You didn't type yes or no");
}
Factoring if/else Statements
Suppose you are writing a program that plays a betting game with a user and you
want to give different warnings about how much cash the user has left. The nested
if/else construct that follows distinguishes three different cases: funds less than
$500, which is considered low; funds between $500 and $1000, which is considered
okay; and funds over $1000, which is considered good. Notice that the user is given
different advice in each case:
if (money < 500) {
System.out.println("You have $" + money + " left.");
System.out.print("Cash is dangerously low. Bet carefully.");
System.out.print("How much do you want to bet? ");
bet = console.nextInt();
} else if (money < 1000) {
System.out.println("You have $" + money + " left.");
System.out.print("Cash is somewhat low. Bet moderately.");
System.out.print("How much do you want to bet? ");
bet = console.nextInt();
} else {