first commit

jasmin/jasmin-2.4/lib/jas/examples/simple.java

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+import jas.*;
+import java.io.*;
+import sun.tools.java.RuntimeConstants;
+
+//
+// This is program that makes calls into the jas package
+// to generate a class that does nothing at all.
+//
+
+class simple implements RuntimeConstants
+{
+  public static void main(String argv[])
+    throws jasError, IOException
+  {
+
+                                // CodeAttr's contain the body of
+                                // a method.
+
+    CodeAttr init = new CodeAttr();
+    init.addInsn(new Insn(opc_aload_0));
+    init.addInsn(new Insn(opc_invokenonvirtual,
+                          new MethodCP("java/lang/Object", "<init>", "()V")));
+    init.addInsn(new Insn(opc_return));
+
+
+                                // ClassEnv's are used as a container
+                                // to hold all information about a class.
+
+    ClassEnv nclass = new ClassEnv();
+    nclass.setClass(new ClassCP("out"));
+    nclass.setSuperClass(new ClassCP("java/lang/Object"));
+
+
+
+                                // Add the init code to the class.
+    nclass.addMethod((short)ACC_PUBLIC, "<init>", "()V", init, null);
+
+
+                                // write it all out
+    nclass.write(new DataOutputStream
+                 (new FileOutputStream("out.class")));
+  }
+}
+
+