java初學(xué)者經(jīng)典代碼：

1. 得到當(dāng)前方法的名字

String methodName =
Thread.currentThread().getStackTrace()[1].getMethodName();
2.轉(zhuǎn)字符串到日期

java.util.Date = java.text.DateFormat.getDateInstance().parse(date
String);
或者是：
SimpleDateFormat format = new SimpleDateFormat( "yyyy-MM-dd" );
Date date = format.parse( myString );
3.向文件末尾添加內(nèi)容

BufferedWriter out = null;try {
out = new BufferedWriter(new FileWriter(”filename”, true));
out.write(”aString”);} catch (IOException e) {
// error processing code} finally {
if (out != null) {
out.close();
}}
4.字符串有整型的相互轉(zhuǎn)換

String a = String.valueOf(2); //integer to numeric string
int i = Integer.parseInt(a); //numeric string to an int