update makefile

java/Makefile

 # Output and source directories
 SOURCE_DIR = src
 OUTPUT_DIR = out
+LIB_DIR = lib
 
 # Main source and class files
-SRC_FILE = Main.java
+SRC_FILE = EditorTD1.java
 CLASS_FILE = Main.class
 
 # Java compiler and interpreter paths
 JAVAC = javac
 JAVA = java
 
+# Classpath, including the "lib" directory
+CLASSPATH = $(OUTPUT_DIR):$(LIB_DIR)/*
+
 .PHONY: all compile run clean
 
 # "make" will compile and run the program
@@ -17,12 +21,12 @@ all: compile run
 
 # "make compile" will compile the program
 compile:
-	$(JAVAC) -sourcepath $(SOURCE_DIR) -d $(OUTPUT_DIR) $(SOURCE_DIR)/$(SRC_FILE)
+	$(JAVAC) -sourcepath $(SOURCE_DIR) -d $(OUTPUT_DIR) -cp $(CLASSPATH) $(SOURCE_DIR)/$(SRC_FILE)
 
 # "make run" will clear the terminal and run the program
 run:
 	clear
-	$(JAVA) -classpath $(OUTPUT_DIR) $(basename $(SRC_FILE)) 
+	$(JAVA) -classpath $(CLASSPATH) $(basename $(SRC_FILE)) 
 
 # "make clean" will remove the output directory's contents
 clean: