-bash: gradlew: command not found

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To compile and run everything, the command is:

`gradlew run`

If you are on a Unix/Linux based system, you must select the local directory for all commands, for example:

`./gradlew run`

To only compile everything, the command is:

`gradlew compileJava`

To compile only a single chapter (including dependencies), use for example:

`gradlew :strings:compileJava`

To run only a single chapter, say:

`gradlew :strings:run`

for example:

$ ./gradlew :housekeeping:OverloadingVarargs
Parallel execution is an incubating feature.
:buildSrc:compileJava NO-SOURCE
:buildSrc:compileGroovy UP-TO-DATE
:buildSrc:processResources UP-TO-DATE
:buildSrc:classes UP-TO-DATE
:buildSrc:jar UP-TO-DATE
:buildSrc:assemble UP-TO-DATE
:buildSrc:compileTestJava NO-SOURCE

:buildSrc:compileTestGroovy NO-SOURCE
:buildSrc:processTestResources NO-SOURCE
:buildSrc:testClasses UP-TO-DATE
:buildSrc:test NO-SOURCE
:buildSrc:check UP-TO-DATE
:buildSrc:build UP-TO-DATE
:onjava:compileJava
:housekeeping:processResources NO-SOURCE
:onjava:processResources NO-SOURCE
:onjava:classes
:onjava:jar UP-TO-DATE
:housekeeping:compileJava
:housekeeping:classes
:housekeeping:OverloadingVarargs
first a b c
second 1
second 2 1
second 0
third

BUILD SUCCESSFUL

Total time: 2.253 secs

ps: class names start with a capital letter.

references:

1. https://github.com/wangbingfeng/OnJava8-Examples/blob/master/README.md