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Possible Duplicate:
When should a method be static?
我正在尝试为地铁/地铁售票机制作一个接口(interface)类。好吧，不是为了真实，而是为了计算机科学模块的类(class)作业。我不明白什么时候使用静态方法。我不太了解计算机科学，但主要方法似乎使用静态。
class UNInterfaceTest
{
public static final int NOTTING_HILL = 1;
public static final int HIGH_KEN = 2;
public static final int GLOUS = 3;
public static final int SOUTH_KEN = 4;
public static final int SLOANE = 5;
public static final int VICTORIA = 6;
public static final int ST_JAMES = 7;
public static final int WESTMINSTER = 8;
public static final int QUIT = 10;
private Input in = new Input();
private static void displayMenu()
{
System.out.println("CIRCLE LINE: Please Select the Number of Your Current Station.");
System.out.println(NOTTING_HILL + ": Nottinghill_Gate");
System.out.println(HIGH_KEN + ": High_Street_Kensignton");
System.out.println(GLOUS + ": Gloucester_Road");
System.out.println(SOUTH_KEN + ": South_Kensignton");
System.out.println(SLOANE + ": Sloane_Square");
System.out.println(VICTORIA + ": Victoria");
System.out.println(ST_JAMES + ": St_James_Park");
System.out.println(WESTMINSTER + ": Westminster");
System.out.println();
System.out.println(QUIT + ". Quit");
}
public static void run()
{
while(true)
{
displayMenu();
int option = getMenuInput();
if (option == QUIT)
{
break;
}
doOption(option);
}
}
private static void doOption(int option)
{
switch(option){
case NOTTING_HILL:
//findNottinghill_Gate();
break;
case HIGH_KEN:
//findHighStreetKensignton();
break;
case GLOUS:
//findGloucesterRoad();
break;
case SOUTH_KEN:
//findSouthKensignton();
break;
case SLOANE:
// findSloaneSquare();
break;
case VICTORIA:
//findVictoria();
break;
case ST_JAMES:
//findStJamesPark();
break;
case WESTMINSTER:
//findWestminster();
break;
default:
System.out.println("Invalid option - try again");
}
}
private int getMenuInput()
{
//KeyboardInput val = new KeyboardInput();
System.out.print("Enter menu selection: ");
int option = in.nextInt();
in.nextLine();
return option;
}
public static void main(String[] args)
{
run();
}
}