Java的三種輸入方式

Java的三種輸入方式：

1.Hard-coded data

2.DOS prompt input

3.Dialog input

下面對三種輸入方式舉例說明：

1.Hard-coded data

public class E1_1 {
	public static void main(String args[]){
		int x=20;
		int y=5;
		int z=x+y;
		System.out.println("x="+x);
		System.out.println("y="+y);
		System.out.println("z="+z);
	}
}

2.DOS prompt input

public class ConeVolume {
	public static void main(String args[]){
		double pi=3.14;
		double radiusOfBase=Double.parseDouble(args[0]);
		double height=Double.parseDouble(args[1]);
		double VolumeOfCone=(1.0/3)*pi*radiusOfBase*radiusOfBase*height;
		System.out.println("Volume of cone="+VolumeOfCone);
	}
}

3.Dialog input

import javax.swing.JOptionPane;
public class E1_5 {
	public static void main(String []args){
		String userInput;
		
		userInput=JOptionPane.showInputDialog("Enter Number");
		int num=Integer.parseInt(userInput);
		
		if (num%2==0)System.out.println(num+" is Even Number.");
		else System.out.println(num+" is Odd Number.");
	}
}