Can't compile the class GraphicsTest.java

Error message during compilation :

> lc GraphicsTest.java
GraphicsTest.java:268: Method scale(float, float) not found in class java.awt.Graphics.
        ng.scale((float)((float)w / (float)10), (float)((float)h / (float)20));
                ^
GraphicsTest.java:274: Method scale(float, float) not found in class java.awt.Graphics.
        ng.scale((float)((float)w / (float)10), (float)((float)h / (float)20));
                ^
2 errors
Exit 1