import java.io.*;
class sh1{
static int a[]=new int[20];
public static void main(String arg[])
{
int i=0;
try{
System.out.println("Input number:");
BufferedReader io=new BufferedReader(new InputStreamReader(System.in));
StringReader ioo=new StringReader(io.readLine());
}
catch(Exception e)
{System.out.println("error!!");}
a[i]=ioo.read();
do
{i++;
a[i]=ioo.read();
}while(a[i]!=-1);
}
}不能通过编译:
C:\Program Files\Xinox Software\JCreator LE\MyProjects\sh.java:15: cannot resolve symbol
symbol : variable ioo
location: class sh1
a[i]=ioo.read();
^
意思好象是ioo没有定义??
class sh1{
static int a[]=new int[20];
public static void main(String arg[])
{
int i=0;
try{
System.out.println("Input number:");
BufferedReader io=new BufferedReader(new InputStreamReader(System.in));
StringReader ioo=new StringReader(io.readLine());
}
catch(Exception e)
{System.out.println("error!!");}
a[i]=ioo.read();
do
{i++;
a[i]=ioo.read();
}while(a[i]!=-1);
}
}不能通过编译:
C:\Program Files\Xinox Software\JCreator LE\MyProjects\sh.java:15: cannot resolve symbol
symbol : variable ioo
location: class sh1
a[i]=ioo.read();
^
意思好象是ioo没有定义??
public static void main(String arg[]) {
int i = 0;
try {
System.out.println("Input number:");
BufferedReader io = new BufferedReader(new InputStreamReader(
System.in));
StringReader ioo = new StringReader(io.readLine());
a[i] = ioo.read();
do {
i++;
a[i] = ioo.read();
} while (a[i] != -1);
} catch (Exception e) {
System.out.println("error!!");
}
}
a[i]=ioo.read();
do
{i++;
a[i]=ioo.read();
}while(a[i]!=-1);
放到 catch上面的try块里面import java.io.*;
class sh1{
static int a[]=new int[20];
public static void main(String arg[])
{
int i=0;
try{
System.out.println("Input number:");
BufferedReader io=new BufferedReader(new InputStreamReader(System.in));
StringReader ioo=new StringReader(io.readLine());
a[i]=ioo.read();
do
{i++;
a[i]=ioo.read();
}while(a[i]!=-1);
}
catch(Exception e)
{System.out.println("error!!");}
}
}
static int a[] = new int[20]; public static void main(String arg[]) {
int i = 0;
try {
System.out.println("Input number:");
BufferedReader io = new BufferedReader(new InputStreamReader(System.in));
StringReader ioo = new StringReader(io.readLine()); a[i] = ioo.read();
do {
i++;
a[i] = ioo.read();
} while (a[i] != -1);
} catch (Exception e) {
System.out.println("error!!");
}
}
}
难道是在try块中声明的变量,其作用域只是在try块中么??