Difference between Array vs ArrayList
Arrays are fixed size
ArrayList's size auotomatically adjusted
Arrays can hold primitives and object
ArrayList can hold only objects
Arrays can be multi dimensional
ArrayList cannot be multi-dimentional
Array is a build in data structure
ArrayList is implementing class of List interface in Collection frameworkaaraylist java
List<String> list = new ArrayList<String>();
list.add("a");
list.add("b");
list.add("c");
list.add("d");
list.add("e");
list.add("f");
//Die Liste zufällig durchmischen
Collections.shuffle(list);
System.out.println(list);
//Die Liste sortieren
Collections.sort(list);
System.out.println(list);
Collections.rotate(list, -1);
System.out.println(list);
//Hier geben wir nur einen Teil (sub) der Liste aus
List<String> sub = list.subList(2, 5);
System.out.println(sub);
Collections.reverse(sub);
System.out.println(sub);
//Hier können wir die Liste manipulieren
ListIterator<String> it = list.listIterator();
while(it.hasNext()){
String str = it.next();
if(str.equals("d"))
it.set("z");
}
while(it.hasPrevious())
System.out.print(it.previous());Copyright © 2021 Codeinu
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