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Courses Plus Student 536 Pointshow to us IllegalArgumentException in java
why am i getting syntax error? anyone please help
class Example {
public static void main(String[] args) {
GoKart kart = new GoKart("purple");
if (kart.isBatteryEmpty()) {
System.out.println("The battery is empty");
}
try{kart.drive(42);
}
catch(IllegalArgumentException iae){
System.out.println("the message is %s",iae.getMessage());
}
}
}
class GoKart {
public static final int MAX_BARS = 8;
private int barCount;
private String color;
private int lapsDriven;
public GoKart(String color) {
this.color = color;
}
public String getColor() {
return color;
}
public void charge() {
barCount = MAX_BARS;
}
public boolean isBatteryEmpty() {
return barCount == 0;
}
public boolean isFullyCharged() {
return MAX_BARS == barCount;
}
public void drive() {
drive(1);
}
public void drive(int laps) {
if (laps > barCount) {
throw new IllegalArgumentException("Not enough battery remains");
}
lapsDriven += laps;
barCount -= laps;
}
}
2 Answers
andren
28,558 PointsThe error comes from the fact that you are using a formatted string (a string with placeholders like %s), but printing it out using println
(print line). Which is a method which does not support formatted strings.
To print formatted string you have to use printf
(print formatted) instead. Like this:
class Example {
public static void main(String[] args) {
GoKart kart = new GoKart("purple");
if (kart.isBatteryEmpty()) {
System.out.println("The battery is empty");
}
try{
kart.drive(42);
}
catch(IllegalArgumentException iae){
System.out.printf("the message is %s",iae.getMessage()); // Replaced println with printf
}
}
}
Evanstar War
Courses Plus Student 536 PointsThank You so much for your kind help.much appreciated