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|
; --- Copyright Jonathan Meyer 1996. All rights reserved. -----------------
; File: jasmin/examples/HelloWeb.j
; Author: Jonathan Meyer, 10 July 1996
; Purpose: Demonstration of a Jasmin-created applet
; -------------------------------------------------------------------------
; HelloWeb.j
; This demonstrates how you can use Jasmin to create an applet.
; The code below is like the Java code:
;
; import java.applet.*;
; import java.awt.*;
;
; public class HelloWeb extends Applet {
; private Font font;
;
; public void init() {
; font = new Font("Helvetica", Font.BOLD, 48);
; }
;
; public void paint(Graphics g) {
; g.setFont(font);
; g.drawString("Hello World!", 25, 50);
; }
; }
.class public HelloWeb
.super java/applet/Applet
.field private font Ljava/awt/Font;
; my init() method - allocate a font and assign it to this.font.
.method public init()V
.limit stack 5
; Create a new Font and call its constructor with
; "Helvetica", 1 (i.e. Font.BOLD), and 48.
new java/awt/Font
dup
ldc "Helvetica"
iconst_1
bipush 48
invokenonvirtual java/awt/Font/<init>(Ljava/lang/String;II)V
; now store the Font on the stack in this.font
aload_0
swap
putfield HelloWeb/font Ljava/awt/Font;
; done
return
.end method
; my paint() method - draws the string "Hello World!" using this.font.
.method public paint(Ljava/awt/Graphics;)V
.limit stack 4
.limit locals 2
; local variable 0 holds <this>
; local variable 1 holds the java.awt.Graphics instance ('g').
; g.setFont(this.font);
aload_1
aload_0
getfield HelloWeb/font Ljava/awt/Font;
invokevirtual java/awt/Graphics/setFont(Ljava/awt/Font;)V
; g.drawString("Hello Web!", 25, 50);
aload_1
ldc "Hello Web!"
bipush 25
bipush 50
invokevirtual java/awt/Graphics/drawString(Ljava/lang/String;II)V
; done
return
.end method
; standard constructor
.method public <init>()V
aload_0
invokenonvirtual java/applet/Applet/<init>()V
return
.end method
|
