string[] str; arraylist<string> arr; str = new string[arr.size()]; str = arr.toarray(str);
5. String str = StringUtils.join(list.toArray(), ","); 方法4:利用Spring Framework的StringUtils [java] view plain copy 1. List<String> list = new ArrayList<String>(); 2. list.add("a"); 3. list.add("b"); 4. list.add("c"); 5. String str = StringUtils.collectionToDelimitedStri...
从下图（a图）的String类的valueOf(Object)的源码可以看到，当传入的值为null的时候返回的是“null”字...
private String createMessageBody(String userName , String appName,String message ){ String messageBody = getResources().getString(R.string.message_body,userName,appName,message); return messageBody; } 1. 2. 3. 4. 5. 6. 可以看到这种方法是需要首先在string文件夹下定义好完整的文字,然后在代码中...
* Map转换String * * @param map * :需要转换的Map * @return String转换后的字符串 */ publicstaticString MapToString(Map<?, ?> map) { StringBuffer sb =newStringBuffer(); // 遍历map for(Object obj : map.keySet()) { if(obj ==null) { ...
private List<String> getDevTtyList() { try { String getRes = performSuCommandAndGetRes("ls /dev/tty*"); ArrayList<String> list = new ArrayList<>(Arrays.asList(getRes.split("/dev/"))); list.remove(""); return list; } catch (Exception e) { MyLogger.e(e, e.getMessage()); re...
for (String[] strings : from) { Collections.addAll(list, strings);} return list.toArray(new String[list.size()]);} 【以下是如何调用这个函数的例子】public static void main(String[] args) { List<String[]> list = new ArrayList<String[]>();list.add(new String[] { "one",...
* Map转换String * *@parammap * :需要转换的Map *@returnString转换后的字符串 */publicstaticStringMapToString(Map<?, ?> map){StringBuffersb=newStringBuffer();// 遍历mapfor(Object obj : map.keySet()) {if(obj ==null) {continue;
String[] strCmd = new String[] {"busybox","df"};ArrayList<String> execResult = executeCommand(strCmd);if (execResult != null){Log.i(LOG_TAG,"成功");return true;}else{Log.i(LOG_TAG,"失败");return false;} (6)访问私有目录 ...
val task: MutableList<Class<out Task?>> = ArrayList() task.add(GetDeviceIdTask::class.java)returntask } override funrun(){ JPushInterface.init(mContext)valapp=mContext as MyApplication JPushInterface.setAlias(mContext,0, app.deviceId)