Explain please
import java.io.*;
public class Chooser{
private static String students[][] = new String[5][2];
private static int row = 0;
public static void main(String args[]){
try{
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter your name: ");
String s = input.readLine();
System.out.print(students[0][0]);
}catch(Exception e){}
}
//This compiles ok.
import java.io.*;
public class Chooser{
private static String students[][] = new String[5][2];
private static int row = 0;
public static void main(String args[]){
try{
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
}catch(Exception e){}
System.out.print("Enter your name: ");
String s = input.readLine();
System.out.print(students[0][0]);
}
//This one does not.
Chooser.java:13: cannot resolve symbol
symbol : variable input
location: class Chooser
String s = input.readLine();
^
1 error
> Execution finished.
Why ?
Your input variable is declared inside try block , so out side cannot access it . you can declare input out side of the try scope. Somhow I change the your code to work. See this what you want ?
import java.io.*;
public class Chooser{
private static String students[][] = new String[5][2];
private static int row = 0;
public static void main(String args[]){
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter your name: ");
try{
String s = input.readLine();
students[0][0]=s;
}catch(IOException e)
{
e.printStackTrace();
}
System.out.println(students[0][0]);
}
}
import java.io.*;
public class Chooser{
private static String students[][] = new String[5][2];
private static int row = 0;
public static void main(String args[]){
BufferedReader input = null;
try{
input = new BufferedReader(new InputStreamReader(System.in));
}catch(Exception e){}
System.out.print("Enter your name: ");
String s = input.readLine();
System.out.print(students[0][0]);
}
}
The problem was...
input was local to the try-catch block.
in this code i have made it accessable both inside and outside this block.
note: readLIne() should be in Try-Catch block. or your function should be:
"public static void main(String args[]) throws Exception"
kapilChhabra
