Java error not found symbol solution (referencing custom class)

Normally, when we write java files, we will reference some self-defined classes. If we compile according to the usual javac *.java format, it will not be found. Symbol error. (Recommended: java video tutorial)

The following two methods are provided for reference

If there are a.java and b under d:/web/wsh .java two files, a.java is referenced in the b.java file. The following is the compilation method

Method 1:
Enter d:/web/wsh: javac a.java
Then exit the wsh directory and enter javac wsh/b.java under d:/wsh The compilation is successful!

Method 2: Enter d:/web/wsh by using javac -classpath(cp) parameter
: javac a.java
Still in d:/wsh/wsh Next: javac -classpath d:/web/wsh b.java
This can also compile successfully!

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