removeoperation.java

呵呵.着是我JAVA东软培训,老师给个一个小的项目.是CMD窗口实现的.就是控制台把.里面有打的.JAR包.呵呵.很好的.看看把.

public class RemoveOperation extends Operation{
	String order[];
	String param;
	int param1;
	int param2;
	boolean control=false;
	public void getCommand(String s[]){//get the parameter;
		if(s.length==4){
			this.order=s;
			control=true;
		}else{
			control=false;
		}
	}
    public String execute(){
    	if(control==true){
	    	try{
	    	
	    	String s=null;
	    	param=order[0];
	    	param1=Integer.parseInt(order[2]);
	    	param2=Integer.parseInt(order[3]); 
	    	if(param.length()>param1&&param1>0){ //judge the first of param1.
	    		if((param.length()-param1)>param2){//judge the second of param2
			    	s=param.substring(0,param1)+param.substring(param1+param2);
			    	return s;
		    	}else{
		    		s=param.substring(0,param1);
		    		return "已经执行操作，但移除个数过大.结果如下："+s;
		    	}
	    	}else{
	    		return "没有找到你要移除的位置！";
	    	}
	    	
    	 }catch(NullPointerException e){
    		return "参数必须是INT类型的！";
    		}catch(Exception e){
    			return "error";
    		}	
	   }else{
	   		return "参数不对！";
	   }
	}  
	
    
	
}