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improve input handling of numeric values

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jason
2022-01-05 19:48:19 -08:00
parent 1b6fd48d48
commit 56ccff2d55
1 changed files with 15 additions and 6 deletions
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21
81_Splat/java/src/Splat.java
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@@ -39,8 +39,7 @@ public class Splat {
System.out.printf(" ACCELERATION = %.2f FT/SEC/SEC +/-5%%\n", initial.getOriginalAcceleration());
System.out.println("SET THE TIMER FOR YOUR FREEFALL.");
System.out.print("HOW MANY SECONDS ");
float freefallTime = scanner.nextFloat();
float freefallTime = promptFloat("HOW MANY SECONDS ");
System.out.println("HERE WE GO.\n");
System.out.println("TIME (SEC) DIST TO FALL (FT)");
System.out.println("========== =================");
@@ -73,18 +72,28 @@ public class Splat {
private float promptTerminalVelocity() {
if (askYesNo("SELECT YOUR OWN TERMINAL VELOCITY")) {
System.out.print("WHAT TERMINAL VELOCITY (MI/HR) ");
return mphToFeetPerSec(scanner.nextFloat());
float terminalVelocity = promptFloat("WHAT TERMINAL VELOCITY (MI/HR) ");
return mphToFeetPerSec(terminalVelocity);
}
float terminalVelocity = (int) (1000 * random.nextFloat());
System.out.printf("OK. TERMINAL VELOCITY = %.2f MI/HR\n", terminalVelocity);
return mphToFeetPerSec(terminalVelocity);
}
private float promptFloat(String prompt){
while(true){
System.out.print(prompt);
try {
return scanner.nextFloat();
} catch (Exception e) {
scanner.next(); // clear current input
}
}
}
private float promptGravitationalAcceleration() {
if (askYesNo("WANT TO SELECT ACCELERATION DUE TO GRAVITY")) {
System.out.print("WHAT ACCELERATION (FT/SEC/SEC) ");
return scanner.nextFloat();
return promptFloat("WHAT ACCELERATION (FT/SEC/SEC) ");
}
return chooseRandomAcceleration();
}