bash-4.2$ cat smiley.java
for(int i=0;i<Math.random()*255;i++){System.out.print(":)");}

bash-4.2$ javac smiley.java
smiley.java:1: error: class, interface, or enum expected
for(int i=0;i<Math.random()*255;i++){System.out.print(":)");}
^
smiley.java:1: error: class, interface, or enum expected
for(int i=0;i<Math.random()*255;i++){System.out.print(":)");}
            ^
smiley.java:1: error: class, interface, or enum expected
for(int i=0;i<Math.random()*255;i++){System.out.print(":)");}
                                ^
smiley.java:1: error: class, interface, or enum expected
for(int i=0;i<Math.random()*255;i++){System.out.print(":)");}
                                                            ^
4 errors

bash-4.2$ java -version
java version "1.7.0_51"
OpenJDK Runtime Environment (IcedTea 2.4.5)
OpenJDK Server VM (build 24.51-b03, mixed mode)