exo4: add code skeleton.

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

diff --git a/exo4/Main.java b/exo4/Main.java
new file mode 100644 (file)
index 0000000..4075cbc
--- /dev/null
+++ b/exo4/Main.java
@@ -0,0 +1,11 @@
+
+class Main {
+
+    /**
+     * The main() function
+     * @param String[] args main() function arguments array
+     */
+    public static void main(String[] args) {
+
+    }
+}

diff --git a/exo4/Makefile b/exo4/Makefile
new file mode 100644 (file)
index 0000000..b6e4a34
--- /dev/null
+++ b/exo4/Makefile
@@ -0,0 +1,89 @@
+# define compiler and compiler flag variables
+# define a variable for compiler flags (JFLAGS)
+# define a variable for the compiler (JC)
+# define a variable for the Java Virtual Machine (JVM)
+
+JFLAGS = -g
+JC = javac
+JVM = java
+
+#
+# Clear any default targets for building .class files from .java files; we
+# will provide our own target entry to do this in this makefile.
+# make has a set of default targets for different suffixes (like .c.o)
+# Currently, clearing the default for .java.class is not necessary since
+# make does not have a definition for this target, but later versions of
+# make may, so it doesn't hurt to make sure that we clear any default
+# definitions for these
+#
+
+.SUFFIXES: .java .class
+
+
+#
+# Here is our target entry for creating .class files from .java files
+# This is a target entry that uses the suffix rule syntax:
+#      DSTS:
+#              rule
+# DSTS (Dependency Suffix     Target Suffix)
+# 'TS' is the suffix of the target file, 'DS' is the suffix of the dependency
+#  file, and 'rule'  is the rule for building a target
+# '$*' is a built-in macro that gets the basename of the current target
+# Remember that there must be a < tab > before the command line ('rule')
+#
+
+.java.class:
+       $(JC) $(JFLAGS) $*.java
+
+
+#
+# CLASSES is a macro consisting of N words (one for each java source file)
+# When a single line is too long, use \<return> to split lines that then will be
+# considered as a single line. For example:
+# NAME = Camilo \
+         Juan
+# is understood as
+# NAME = Camilo        Juan
+
+CLASSES = \
+               Main.java
+
+#
+# MAIN is a variable with the name of the file containing the main method
+#
+
+MAIN = Main
+
+#
+# the default make target entry
+# for this example it is the target classes
+
+default: classes
+
+
+# Next line is a target dependency line
+# This target entry uses Suffix Replacement within a macro:
+# $(macroname:string1=string2)
+# In the words in the macro named 'macroname' replace 'string1' with 'string2'
+# Below we are replacing the suffix .java of all words in the macro CLASSES
+# with the .class suffix
+#
+
+classes: $(CLASSES:.java=.class)
+
+
+# Next two lines contain a target for running the program
+# Remember the tab in the second line.
+# $(JMV) y $(MAIN) are replaced by their values
+
+run: $(MAIN).class
+       $(JVM) $(MAIN)
+
+# this line is to remove all unneeded files from
+# the directory when we are finished executing(saves space)
+# and "cleans up" the directory of unneeded .class files
+# RM is a predefined macro in make (RM = rm -f)
+#
+
+clean:
+       $(RM) *.class