File input and output

1 output:
PrintWriter out = new PrintWriter(new FileWriter(output));
for(int i=0; i<n; i++)
{
for(int j=0; j<n; j++)
{
out.print(array[i][j] + "\t");
}
out.println();
}
out.flush();
out.close();

2 input:
BufferedReader in = new BufferedReader(new FileReader("input-A"));
String line;
String s;
s=in.readLine();
int n= Integer.parseInt(s);
float[][] a=new float[n][n];

for(int i=0; i<n; i++)
{
line=in.readLine();
if(line==null) break;
String[] tmp=line.split(" ");
for(int j=0; j<n; j++)
{
a[i][j] = Float.parseFloat(tmp[j]);
}
}