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Java Development Basics: Compiling, Running, and Importing

This guide covers using javac and java commands, compiling source files, launching apps, setting classpaths, and using static imports in Java programming. Learn essential techniques for developing Java applications efficiently.

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Java Development Basics: Compiling, Running, and Importing

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Presentation Transcript

  1. Development

  2. Using Javac & java command

  3. Compiling with javac • javac [option] [source files]:

  4. Compiling with -d

  5. Launching Apps with Java

  6. Searching for Other Classes • Declaring and Using Classpaths: -classpath /com/foo/acct:/com/foo => means specify 2 directories where classes can be found -classpath /com/foo/acct:/com/foo:. • Search 2 directories and search current directory * Use “-cp” to abbreviate “-classpath”

  7. JAR files

  8. Using Static Imports Before static imports: public class TestStatic { public static void main(String[] args) { System.out.println(Integer.MAX_VALUE); System.out.println(Integer.toHexString(42)); } } After static imports: import static java.lang.System.out; // 1 import static java.lang.Integer.*; // 2 public class TestStaticImport { public static void main(String[] args) { out.println(MAX_VALUE); // 3 out.println(toHexString(42)); // 4 } }

  9. FIN

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