第一周汇总

汇总

1.JAVA的随机数产生

(1) Math.random()*int;

(2) new Random();

(3)currentTimeMillis();

2.弹窗地使用

(1)JOptionPane.showOptionDialog(null,"","",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE,null,options,options[0]);

(2)JOptionPane.showConfirmDialog(null, outputArea, "", JOptionPane.YES_NO_OPTION);