public static String readLine().........Just a few lines of code that are still giving me problems. Could someone explain these to me?

public static String readLine()...........................Reads it Character by Character from Standard input using Systme.in.read() method
{
StringBuffer sb=new StringBuffer();.................(What is this doing?)
try

{

while(true)

{

char c=(char)System.in.read();

if(c=='\r'||c=='\n' || c==-1 || c==255)...........this line checks for the EOF or newline.

{
break; .......................................This is telling it to go to the end of the program?
}
sb.append(c);..........sb.append(c)  stores the characters

}
}
catch(Exception ex).........................Not sure about this one

{

}

return sb.toString();.....................Also not sure about

}