Java Program for Multiplication of Command Line Floating Point Numeric Arguments

Java Program for Product of Command Line Floating Point Numeric Arguments

Reads command line floating point value arguments and computes the multiplication of them.

To convert string to floating point numeric value using Float.parseFloat method.

class FloatMultiplicationTest {
	public static void main(String[] values) {
		float product = 1.0f;
		System.out.println("Calculates Multiplication for below floating point numeric values");
		
		for(int i=0;i<values.length;i++){
			System.out.println(values[i]);
			product = product * Float.parseFloat(values[i]);
		}
		System.out.println("Multiplication :" + product);
		
	}
}

D:\Java_Programs>javac FloatMultiplicationTest.java
D:\Java_Programs>java FloatMultiplicationTest 20.5 12.75 5.89 3.8 1.57 
class FloatMultiplicationTest {
	public static void main(String[] values) {
		float product = 1.0f;
		System.out.println("Calculates Multiplication for below floating point numeric values");
		
		for(int i=0;i<values.length;i++){
			System.out.println(values[i]);
			product = product * Float.parseFloat(values[i]);
		}
		System.out.println("Multiplication :" + product);
		
	}
}

Invalid Command Line Integer Arguments

If we pass invalid flaoting point value as command line arguments, above java program fails to calculate the multiplication and throws exception.

D:\Java_Programs>javac FloatMultiplicationTest.java
D:\Java_Programs>java FloatMultiplicationTest 20.5 12.75 5.89 3.8 1.57 Testing

Calculates Multiplication for below floating point numeric values
20.5
12.75
5.89
3.8
1.57
Testing
Exception in thread "main" java.lang.NumberFormatException: For input string: "Testing"
	at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source)
	at sun.misc.FloatingDecimal.parseFloat(Unknown Source)
	at java.lang.Float.parseFloat(Unknown Source)
	at FloatMultiplicationTest.main(FloatMultiplicationTest.java:8)

Java Program for Multiplication of Command Line Arguments Excluding Invalid Floating Point Values

try catch block is used to find the invalid command line integer arguments and finds the multiplication for remaining valid command line integer arguments.

class FloatMultiplicationTest {
	public static void main(String[] values) {
		float product = 1.0f;
		System.out.println("Calculates Multiplication for below floating point numeric values");
		
		for(int i=0;i<values.length;i++){
			System.out.println(values[i]);
			try {
			product = product * Float.parseFloat(values[i]);
			} catch (NumberFormatException e) {
				System.out.println("Invalid floating point value in command line arguments: " + e.toString());
			}
		}
		System.out.println("Multiplication :" + product);
		
	}
}

D:\Java_Programs>javac FloatMultiplicationTest.java
D:\Java_Programs>java FloatMultiplicationTest 20.5 12.75 5.89 3.8 1.57 Testing
Calculates Multiplication for below floating point numeric values
20.5
12.75
5.89
3.8
1.57
Testing
Invalid floating point value in command line arguments: java.lang.NumberFormatException: For input string: "Testing"
Multiplication :9184.649