Groovy: NumberFormatException: For input string: "-5.2" - groovy

Question

I have this code:
static def parseString(String inputRow, Particle particle) {
//input row is:
//static final inputRow = "1 -5.2 3.8"
def map = inputRow.split()
particle.mass = Integer.parseInt(map[0])
particle.x = Integer.parseInt(map[1])
particle.y = Integer.parseInt(map[2])
}
This code is throwing this error:
java.lang.NumberFormatException: For input string: "-5.2"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:492)
at java.lang.Integer.valueOf(Integer.java:582)
at RepulsionForce.parseString(RepulsionForce.groovy:13)
at RepulsionForceTest.string should be parsed into particles(RepulsionForceTest.groovy:27)
How do I avoid this exception?

Answer 1

You can cut down redundant lines as shown below where particle is a map:
def arr = inputRow.split()
def mass, x, y
(mass, x, y) = arr*.toDouble()
def particle = [:] << [mass: mass, x: x, y: y]
Missed the part where Particle class has been referred instead.

Answer 2

Whoops, figured this out... 5.2 is not an integer.
static def parseString(String inputRow, Particle particle) {
def map = inputRow.split()
particle.mass = Double.parseDouble(map[0])
particle.x = Double.parseDouble(map[1])
particle.y = Double.parseDouble(map[2])
}

Answer 3

Here is one way to do it... Answer within a full solution:
// setup
class Particle {
def mass
def x
def y
}
def particle = new Particle()
def inputRow = "1 -5.2 3.8"
def fieldsByIndex = [0: "mass", 1: "x", 2: "y"]
// answer
inputRow.split().eachWithIndex { val, index ->
def field = fieldsByIndex.get(index)
particle."${field}" = val.toDouble()
}
// output
println "mass : " + particle.mass
println "x : " + particle.x
println "y : " + particle.y

Answer 4

Explanation: You Mistakenly trying to parse Double number to Integer number and it's not applicable, not sharing the same type ( integer != double) , and not gonna work - Therefore you getting java.lang.NumberFormatException: For input string exception which explicitly inform you for the type issue.
Solution: Convert it to to double using Double Class.
Double.parseDouble(map[i])