Arrays - Quia阵列-全能.doc

ArraysArrays are data structures consisting of related data items of the same type using contiguous memory locations.Well be using static arrays (stays the same use once created).Array elements are numbered the same as C+ numbering scheme.(0 n-1, where n is the array size.) myarray0=7 myarray1=198 myarray2=-225 myarray3=-75 myarray4=4 myarray5=118 myarray6=-36 myarray7=94Every array is Java knows its own length and maintains this information in a variable called length. myarray.lengthArrays: Declaring and AllocatingArrays are allocated dynamically with the new operator. int myarray = new int4;or int myarray; myarray = new int 4;or String palindrome= new String50, reverse= new String50;or double sal1,sal2; /array type and brackets can be used at the /beginning to indicate that all identifiers listed represent arrays.Allocating arrays and initializing its elements:Look p318 InitArray ProgramInitializer Listsint temp = 50,60,70,80,90,100;array size is determined by the number of elements in the initializer list.new is not required when using initializer lists.Look p320 Use of initializer list final is like const from C+ Examples of Arrays:Summing the Elements of an Array p322Histograms p323*Elements as Counters p325 (RollDie)Student Poll Program p326Assignment: Frequency of Die Sums ProgramSimulate the rolling of two dice. Use your roll() method. Sum the rolls (numbers should vary from 2 to 12). Your program should roll the die 36,000 times. Use a single-subscripted array to tally the numbers of times each possible sum appears. Displa