I've created an ArrayList by looping over an array of values, which creates an array in the "common" key/value structure.
def timeWithIdentifier = []
for (i = 0; i <= time.size()-1; i++) {
timeWithIdentifier [i] = i + ":'" + time[i] + "'";
}
The array looks like the following:
timeWithIdentifier = [0:'1423734900000', 1:'1423735200000', 2:'1423735500000', 3:'1423735800000', 4:'1423736100000', 5:'1423736400000', 6:'1423736700000', 7:'1423737000000', 8:'1423737300000', 9:'1423737600000', 10:'1423737900000', 11:'1423738200000', 12:'1423738500000', 13:'1423738800000', 14:'1423739100000', 15:'1423739400000', 16:'1423739700000', 17:'1423740000000', 18:'1423740300000', 19:'1423740600000', 20:'1423740900000', 21:'1423741200000', 22:'1423741500000', 23:'1423741800000', 24:'1423742100000', 25:'1423742400000']
Asking for the class of this via timeWithIdentifier.getClass() I get the following result java.util.ArrayList.
Now I want to put the above key/value combination in a new TreeMap by using the following: treeMapTime = new TreeMap<Integer, Long>(timeWithIdentifier )
Unfortunately I get the following error
groovy.lang.GroovyRuntimeException: Could not find matching constructor for: java.util.TreeMap(java.util.ArrayList)
What am I missing about it?
tl;dr:
Here's how it should be done:
def time = (1..10)
def timeWithIdentifier = [:]
for (i = 0; i <= time.size()-1; i++) {
timeWithIdentifier[i] = time[i]
}
new TreeMap(timeWithIdentifier)
Explanation:
As can be seen here TreeMap doesn't take an ArrayList as constructor argument - Map should be passed.
When processing items with for loop you're not creating instances of Maps but strings. Change timeWithIdentifier to an instance of Map an add item under i key. Then pass whole timeWithIdentifier as an argument TreeMap constructor. It can be even easier:
def time = (1..10)
def timeWithIdentifier = [:] as TreeMap
for (i = 0; i <= time.size()-1; i++) {
timeWithIdentifier[i] = time[i]
}