Java特有の仕様
・表示：System.out.println()
・論理：boolean ：trueまたはfalse
・String型 (例)String msg = "Hello World";
(例)
public class MyApp { public static void main(String[] args) { /* char */ char a = 'a'; /* int */ int x = 10; /* long */ long y = 55555555L; // last is L /* double */ double d = 123.4; /* float */ float f = 32.33F; // last is F /* logic */ boolean flag = true; // or false /* string */ // \n = LineFeed \t = tab String msg; msg = "Hello \nWorld Aga\tin!"; System.out.println(msg); } }
配列
宣言と代入
int[] sales; sales = new int[3]; sales[0] = 0;
初期化
int[] sales; sales = new int[]{100, 200, 300}; // another expression int[] sales = {100, 200, 300};
配列の要素数取得
int[] sales = {100, 200, 300}; for (int i = 0; i < sales.length; i++) { System.out.println(sales[i]); } // another expression for (int sale : sales) { System.out.println(sale); }
