如何用Java
问题描述:
File Name = new File("G:/Java/lesson25_1/Name.txt");
if(Name==null){
JOptionPane.showMessageDialog(this, "Details are missing");
}
try{
FileReader fr1 = new FileReader("Name.txt");
BufferedReader br1=new BufferedReader(fr1);
String str=br1.readLine();
br1.close();
创建文件时,我这样做的方法,它不到风度工作时,我按一下按钮如何用Java
答
有名为exists
检查给定文件是否存在,或者没有文件的方法。
String path = "G:/Java/lesson25_1/Name.txt";
File file = new File(path);
if(!file.isFile() || !file.canRead()){
JOptionPane.showMessageDialog(this, "Details are missing");
} else {
try {
FileReader fr1 = new FileReader("Name.txt");
BufferedReader br1=new BufferedReader(fr1);
String str=br1.readLine();
br1.close();
} catch (Exception e){
e.printStackTrace();
}
}
的[我如何创建一个文件,并写入它在Java中?(可能的复制https://*.com/questions/2885173/how-do-i-create-a-file-and -write-to-it-in-java) – mscheker