package com.imooc.加載類;

public class Office_Static {
	public static void main(String[] args) {
		//new 創(chuàng)建對象，是靜態(tài)加載類，在編譯時刻就需要加載所有的可能使用到的類
		if("Word".equals(args[0])){
			Word w = new Word();
			w.start();
		}
		if("Excel".equals(args[0])){
			Excel e = new Excel();
			e.start();
		}
	}
}

package com.imooc.加載類;

public interface OfficeAble {
	public void start();
}

package com.imooc.加載類;

public class Word implements OfficeAble{
	public void start(){
		System.out.println("word start");
	}

}

package com.imooc.加載類;

public class Excel implements OfficeAble{

	public void start(){
		System.out.println("excel start");
	}
}

package com.imooc.加載類;

public class OfficeBetter {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			//動態(tài)加載類，在運行時刻加載
			Class c = Class.forName(args[0]);//在運行配置里面輸入com.imooc.加載類.Excel
			//通過類類型，創(chuàng)建該類對象(先轉(zhuǎn)換為Word和Excel的共同接口OfficeAble)
			OfficeAble oa = (OfficeAble)c.newInstance();
			oa.start();
			
			//不推薦下面兩種，因為不確定是加載Word還是Excel，要強轉(zhuǎn)
//			Word word = (Word)c.newInstance();
//			word.start();
//			Excel excel = (Excel)c.newInstance();
//			excel.start();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}