int a;
public void kj(){
System.out.print("请设置数据库大小:");
a = input.nextInt();
}
User[] users = new User[a];
为什么这样会报错!!!
public void kj(){
System.out.print("请设置数据库大小:");
a = input.nextInt();
}
User[] users = new User[a];
为什么这样会报错!!!
try{
BufferedReader reader = new BufferedReader(new InputStreamReader (System.in));
String s = reader.readLine();
int i = Integer.parseInt(s);
String[] array = new String[i];
System.out.println(array.length);
}catch(Exception e ){
e.printStackTrace();
}
}
public void kj(){
System.out.print("请设置数据库大小:");
Scanner input = new Sacnner(System.in);
a = input.nextInt();
}
User[] users = new User[a];
修改为Scanner input = new Scanner (System.in);
这样
kj();
User[] users = new User[a];
a=s.nextInt();
int a;
User[] users ;
public void kj(){
System.out.print("请设置数据库大小:");
a = input.nextInt();
users = new User[a];
}