2013年1月8日
javax.swing.JOptionPane; (框的类)(GUI)
JOptionPane.showMessageDialog(arg0, arg1); (对话框)
JOptionPane.showInputDialog(arg0);(输入框) JOptionPane.showMessage("null"," "," ",JOptionPane.INFORMATION_MESSAGE );(对话框) JOptionPane.showInputDialog(null," "," ",JOptionPane.QUESTION_MESSAGE);(输入框)使用框输入的字符串的转化:
转化int型 Integer.parseInt();
转化double型 Double.parseDouble();
javax.swing.JFileChooser 显示文件对话框
例:JFileChooser file = new JFileChoooser()
if(file.showOpenDialog(null) == JFileChooser.APPROVE_OPTION)
APPROVE_OPTION (表示 点击Open 按钮)
CANCEL_OPTION (表示 点击Cancel 按钮)
System.currentTimeMillis() (获取时间的类)(返回的毫秒)
Date()
Date(elapseTime:long);
toString() :String
getTime() :long
setTime(elapseTime:long) : void
java.util.Scanner (输入包)
java.util.Random (随机类)
Random()
Randon(seed:long)
nextInt() : int
nextInt(n :int) : int
nextLong() : long
nextFloat() : float
nextBoolean() : boolean