Answers to Self-Check Problems - Building Java Programs: A Back to Basics Approach - page 1063

System.out.print("-");
}
System.out.println("+");
}
14. A PrintStream object is used to write to an external file. It has methods such as
println and print .
15. PrintStream out = new PrintStream(new File("message.txt"));
out.println("Testing,");
out.println("1, 2, 3.");
out.println();
out.println("This is my output file.");
16. public static String getFileName() {
Scanner console = new Scanner(System.in);
String filename;
do {
System.out.print("Type a file name: ");
filename = console.nextLine();
} while (!(new File(filename).exists()));
return filename;
}
17. // reprompts until file name is valid
public static void printEntireFile2()
throws FileNotFoundException {
String filename = getFileName();
Scanner input = new Scanner(new File(filename));
while (input.hasNextLine()) {
System.out.println(input.nextLine());
}
}
Chapter 7
1. First element: numbers[0]
Last element: numbers[9] or numbers[numbers.length - 1]
2. int[] data = new int[5];
data[0] = 27;
data[1] = 51;
data[2] = 33;
data[3] = -1;
data[4] = 101;