W

wait()

lock status and, 712

thread interaction, 725–728

thread methods, 729

while loops

creating labeled while loop, 342–343

exercise creating labeled while loop, 344

overview, 331–332

whitespace character (\s), 475

widening

overloading and, 238

reference variables and, 240–243

width value, format strings, 490

word character (\ w), 475

wrapper classes

boxing and, 227–228

constructor arguments and, 228

constructors, 229

conversion utilities, 230–233

purpose of, 228

two-minute drill, 257–258

valueOf() methods, 230

wrapping I/O classes, 435–438

writeObject, serialization, 449–452