Java Reference
In-Depth Information
public class TryScanner {
public static void main(String[] args) {
Scanner kbScan = new Scanner(System.in);
// Create the scanner
int selectRead = 1;
// Selects the read
operation
final int MAXTRIES = 3;
// Maximum attempts
at input
int tries = 0;
// Number of input
attempts
while(tries < MAXTRIES) {
try {
switch(selectRead) {
case 1:
System.out.print("Enter an integer: ");
System.out.println("You entered: " + kbScan.nextLong());
++selectRead;
// Select next read
operation
tries = 0;
// Reset count of
tries
case 2:
System.out.print("Enter a floating-point value: ");
System.out.println("You entered: " + kbScan.nextDouble());
++selectRead;
// Select next read
operation
tries = 0;
// Reset count of
tries
case 3:
System.out.print("Enter a boolean value(true or false): ");
System.out.println("You entered: " + kbScan.nextBoolean());
}
break;
} catch(InputMismatchException e) {
String input = kbScan.next();
System.out.println("\"" + input + "\" is not valid input.");
if(tries<MAXTRIES) {
System.out.println("Try again.");
} else {
System.out.println(" Terminating program.");
System.exit(1);
}
}
}
}
}
TryScanner.java
