public String[] dosplit(String string) {
    	String[] result=string.split("<+>");
    	return result;
	}
    //字串陣列轉字串
    
public String dojoin(String[] strings) {
    	String result=String.join("<+>", strings);
    	return result;		
	}//字串轉字串陣列

另：
public String dojoin(ArrayList<String> arrayList) {
    	String[] arr1 = (String[])arrayList.toArray(new String[0]);
    	String result=String.join("<+>", arr1);
    	return result;		
	}//arraylist轉字串