摘要: package test; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JFrame; import javax.swing.JPanel; public class test extends JFrame { private MyPanel1 ... 阅读全文
posted @ 2018-01-18 00:53 爱吃醋的工程师 阅读(10324) 评论(0) 推荐(0)
摘要: 例 : String a =["str1","str2"] String[] str = new String[a]; str = null;清空就行了 若str = "";只是空的字符给数组str 例 : String a =["str1","str2"] String[] str = new S 阅读全文
posted @ 2018-01-18 00:34 爱吃醋的工程师 阅读(3135) 评论(0) 推荐(0)