Java SE Troubleshooting Point record

The method of the object class and its integration

Enumerations/enumerations vs. switch

Inner class

BigInteger

Single-instance design pattern in threading lazy, a hungry man????

Synchronized and lock usage differences

Combined design pattern

ArrayList (Debug)???

Iterator iterator (next Remove method)

Set and iterator actions during iteration iterable

Map.entry ()

The relationship between HashSet and HashMap

Comparator/comparable

Treeset/treemap

FileFilter

Variable parameters (array advanced)

Byte input stream read, buffer array value, not read coverage problem? (day) FileInputStream

FileReader's Read action

Methods that are integrated by the wrapper data type (such as String)

Java SE Troubleshooting Point record