public class HelloWorld{} public static void main(String[] args){} System.out.println("");
byte short char int long=90L float=3.14f double boolean (flag)=true or false; \n \t \r
int g = a%b; a++ a-- ++a --a ; Scanner input = new Scanner(System.in);
double aa = input.nextDouble(); && || != <= >=
if(){continue} else if(){} else{}; switch(){ case1: break; case2: break; default: break;return;}
while(int a=0; a<5;i++){} while(!result.equalsIgnoreCase("Y")){} do{}while(); for(){}
int[] a ={10,20,30}; int[] a = new int[]{10,20,30}; int[] a = new int[5]; i<a.length;
private String name; public String getName(){return name;} public void setName(String name)
{this.name = name;} Arrays.sort(); String pwd; pwd.equals() >=6; toLowerCase(); toUpperCase();
A.Concat(B); A+B;