I have ArrayList containing objects inside of it, every object in the ArrayList has a property and I wan't to see which of these objects has the lowest value on that property. Here's my code + Object structure
class ServerInfo{
public int playerCount = 0; //This is different per every object in the array list
}
List<ServerInfo> onlineServers = new ArrayList<ServerInfo> //From this array i want object with lowest 'playerCount' property value.
Do it as follows:
ServerInfo elemWithMin = onlineServers.get(0);
int min = onlineServers.get(0).playerCount;
for(int i = 1; i < onlineServers.size(); i++) {
if(onlineServers.get(i).playerCount < min) {
min = onlineServers.get(i).playerCount;
elemWithMin=onlineServers.get(i);
}
}
At the end of this loop, elemWithMin will have the element with the minimum value of playerCount.
A quick test:
class Main {
public static void main(String[] args) {
List<ServerInfo> onlineServers = new ArrayList<ServerInfo>();
ServerInfo si1 = new ServerInfo();
ServerInfo si2 = new ServerInfo();
ServerInfo si3 = new ServerInfo();
si1.playerCount = 20;
si2.playerCount = 10;
si3.playerCount = 30;
onlineServers.add(si1);
onlineServers.add(si2);
onlineServers.add(si3);
ServerInfo elemWithMin = onlineServers.get(0);
int min = onlineServers.get(0).playerCount;
for (int i = 1; i < onlineServers.size(); i++) {
if (onlineServers.get(i).playerCount < min) {
min = onlineServers.get(i).playerCount;
elemWithMin = onlineServers.get(i);
}
}
System.out.println("The minimum value of payerCount: " + elemWithMin.playerCount);
}
}
Output:
The minimum value of payerCount: 10
You can use Java 8 stream like below :
ServerInfo serverInfoWithMinPlayerCount = onlineServers.stream().min(Comparator.comparing(ServerInfo::getPlayerCount)).orElseThrow(NoSuchElementException::new);
.orElseThrow(NoSuchElementException::new)