Initial commit.

.gitignore

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+env.mk
+build/

META-INF/MANIFEST.MF

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+Manifest-Version: 1.0
+MIDlet-Vendor: bedohswe
+MIDlet-Version: 1.0
+MicroEdition-Configuration: CLDC-1.0
+MIDlet-Name: Hello
+MIDlet-Description: Test MIDlet
+MicroEdition-Profile: MIDP-2.0
+MIDlet-1: Hello,/icon.png,com.Hello
+

Makefile

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+include env.mk
+
+SRC = src
+JCFLAGS = -target 1.1 -source 1.2 -sourcepath $(SRC) -cp $(HEADERS) -Xlint:-options -d build -g:none
+
+SRC_DIR := src
+
+OUT_DIR := build
+
+SRCS := $(wildcard $(SRC_DIR)/*/*.java)
+
+CLS := $(SRCS:$(SRC_DIR)/%.java=$(OUT_DIR)/%.class)
+
+.SUFFIXES: .java 
+
+.PHONY: all clean
+
+all: $(CLS)
+
+$(CLS): $(OUT_DIR)/%.class: $(SRC_DIR)/%.java
+	mkdir -p build
+	$(JC) $(JCFLAGS) $<
+
+clean: 
+	rm -rf build/
+	rm -f result.jar
+
+pack:
+	jar -cmf META-INF/MANIFEST.MF result.jar -C build . -C res .
+
+run:
+	$(EMULATOR) result.jar 

default.mk

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+JC = /usr/lib/jvm/java-1.8-openjdk/bin/javac 
+HEADERS = 
+EMULATOR = java -jar
+

src/com/Hello.java

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+package com;
+
+import javax.microedition.midlet.MIDlet;
+import javax.microedition.lcdui.TextBox;
+import javax.microedition.lcdui.Display;
+
+public class Hello extends MIDlet {
+	public Hello() {
+		Display display = Display.getDisplay(this);
+		TextBox hello = new TextBox("Hello!", "Hello World!", 256, 0);
+		display.setCurrent(hello);
+	}
+	public void startApp() {}
+	public void destroyApp(boolean unconditional) {}
+	public void pauseApp() {}
+}