Implement DataInputStream::readFully and adjust some method position #633

Job	Run time
rust_ci (macos-latest, stable)	1m 44s
rust_ci (ubuntu-latest, beta)	1m 27s
rust_ci (macos-latest, beta)	2m 2s
rust_ci (windows-latest, beta)	4m 9s
rust_ci (windows-latest, stable)	3m 57s
rust_ci (ubuntu-latest, stable)	1m 26s
	14m 45s

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