May

摘要： keyword thisthisis a reference to thecurrent objecthttp://docs.oracle.com/javase/tutorial/java/javaOO/thiskey.htmlkeyword staticcreate fields and methods that belong to the classhttp://docs.oracle.com/javase/tutorial/java/javaOO/classvars.html 阅读全文

摘要： first exmapl ball.javaBall+size=20(attribute)+color(atribute)+move(mthod)class Ball{ attibutes pubilic final static int size=20; private int xPos; private int yPos; private Color color; constructor(creat object) public Ball(int x, int y, color c) { xPos=x; yPos=y; color=c; } metho... 阅读全文