java - System.out.println prints the string but System.out.print does not -

i trying store words in file separated coma in java array
file is

age,income,student,credit rating,class: buys computer

youth,high,no,fair,no

youth,high,no,excellent,no

middle aged,high,no,excellent,no

senior,medium,no,fair,yes

senior,low,yes,fair,yes

senior,low,yes,excellent,no

public class test {   public static void main(string args[]) throws filenotfoundexception, ioexception{      fileinputstream f=new fileinputstream("f:\\pr\\src\\dmexam\\inp2.txt");     int size,nr=7,nc=5,j=0,i=0;     char ch;     string table[][]=new string[nr][nc];     size=f.available();     table[0][0]=new string();     while(size--!=0){          ch=(char)f.read();          if(ch=='\n')          {              i++;              if(i>=nr)                  break;              table[i][0]=new string();              j=0;              continue;           }          if(ch==',')          {                  j++;             table[i][j]=new string();             continue;          }           table[i][j]+=ch;     }     f.close();     system.out.println("the given table is:::---");     for(i=0;i<nr;i++){        for(j=0;j<nc;j++){           system.out.print("  "+table[i][j]);          system.out.print("  ");        }      }  }   } 

but output is

the given table is:::---

but if changed this

system.out.println("the given table is:::---"); for(i=0;i<nr;i++){     for(j=0;j<nc-1;j++){          system.out.print("  "+table[i][j]);          system.out.print("  ");     }     system.out.println(table[i][nc-1]);  } 

the output is

the given table is:::--- age income student credit rating class: buys computer

youth high no fair no

youth high no excellent no

middle aged high no excellent no

senior medium no fair yes

senior low yes fair yes

senior low yes excellent no

i want know "why system.out.print not workig???"...

the printstream system.out uses has internal buffer, since writing stdout relatively expensive -- wouldn't want each character. buffer automatically flushed when write newline, why println causes text appear. without newline, string sits in buffer, waiting flushed.

you can force manual flush invoking system.out.flush().