Runtime

package runtimeDemo;
class RuntimeDemo 
{
	public static void main(String[] args) throws Exception
	{
		//Runtime單例模式，不允許創建對象，只可通過getRuntime（）獲取
        Runtime r=Runtime.getRuntime();
		//process 的方法全部抽象，由底層實現
		Process p=r.exec("notepad.exe SystemDemo.java");
		Thread.sleep(10000);
		p.destroy();
	}
}