摘要：
package shurushuchu; import java.io.*; public class test5 { public static void main(String[] args) { try { File file = new File("d:/IoDemo.java"); if(!file.exists()) ... 阅读全文
摘要：
package shurushuchu; import java.io.*; public class test4 { public static void main(String[] args) { //创建文件输出 try { File file = new File("d:/test4.txt"); if(!file.... 阅读全文