【名词&注释】
成熟度等级(maturity grade)
[多选题]以下哪些是合法的构造RandomAccessFile对象的代码()。
A. RandomAccessFile(new File("D:\\myex\\dir1\\..\\test.java"),"rw")
B. RandomAccessFile("D:\\myex\\test.java","r")
C. RandomAccessFile("D:\\myex\\test.java")
D. RandomAccessFile("D:\\myex\\test.java","wr")