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List Interface

Basics​

  • Ordered collection
  • Access by index
  • May contain duplicates

Iterate through Values:​

  • use for loop directly:
// List<List<Interval>> avails);
for (List<Interval> employeeIntervals: avails){
  for (Interval interval: employeeIntervals){
    // do...
  }
}

Declare with default values:​

Convert a primitive list to a List object:​

  • Use Case 1: I know my values
String a[] = new String[] { "A", "B", "C", "D" }; 
List<String> list = Arrays.asList(a); 
// or
List<String> list2 = Arrays.asList("1", "2", "3");
  • Use Case 2: I know my length:
String a[] = new String[(1 << 8) -1];  // know my length
List<String> list = Arrays.asList(a);