Arrays in Java

1, you can create an array of your own classes, but your own class must implement the Get () and put functions

2, declare array: int[] arrayofint. Note that you cannot specify a size when you define an array

3, create and initialize: via new. arrayofints = new int[42]; can also be merged: double[] numbers = new double [5];

Importjava.util.Arrays;/*** Created by Jimmy on 2015/5/24.*/ Public classArraytest { Public Static voidMain (string[] args) {//1-Statement        int[] arrayofints; //Initialization Method 1Arrayofints =New int[42]; //Initialization Method 2        Double[] Doublenums =New Double[20]; //Initialization Method 3        int[] ArrayOfInt1 = {1,2,3,4,5,6}; //2-Copy//arraycopyString[] names = {"Ryan", "Tim", "Shark", "Ted"}; String[] Tmparray=NewString[names.length * 2]; System.arraycopy (names,0, Tmparray, 0, 4); //copyOfstring[] NameArray =arrays.copyof (names, names.length); NameArray= arrays.copyof (names, Names.length + 2); //Copyofrange, excluding the to elementNameArray = Arrays.copyofrange (names, 1, 3); //Enhanced for loop traversal arraySYSTEM.OUT.PRINTLN ("Copy function test:");  for(String D:namearray) System.out.print (" " +d);        System.out.println (); //3-Multidimensional Arrays        Boolean[] checked; Checked=New Boolean[3][]; checked[0] =New Boolean[8]; checked[1] =New Boolean[8]; checked[2] =New Boolean[8]; System.out.println ("MultiArray test:");  for(Boolean[] b:checked) {             for(Booleanbv:b) System.out.print (BV+ " ");        System.out.println (); }        //System.out.println (doublenums.tostring ());    }}

Arrays in Java