Revert "Create chapter-1.md"

This reverts commit a394d1d434048a05c7bf43811304d7f9cc6beca9.
Merge branch 'master' of https://github.com/cychenyue/CORE.JAVA.VOLUME-I

Conflicts:
	chapter-1.md
Revert "Revert "Create chapter-1.md""

This reverts commit 84c1d374515574c94da170a3a095027a9568253b.

Conflicts:
	chapter-1.md
Revert "Revert "Create chapter-1.md""

This reverts commit 84c1d374515574c94da170a3a095027a9568253b.

Conflicts:
	chapter-1.md
Revert "Revert "Revert "Create chapter-1.md"""

This reverts commit 96b45942a27c5f997f6d708a9f53f050cc347763.

Conflicts:
	chapter-1.md