Java（Eclim + Vim）“ system.out.print”不起作用

Question

I am new to Java programming, and today while messing with eclim and vim, I discovered that the System.out.println(); function is not working.

class apples{
public static void main(String args[]){
    double tuna = 5.28;
    System.out.print(tuna);
}
}

This does not give me a result.

But when I do:

class apples{
public static void main(String args[]){
    double tuna = 5.28;
    System.out.println(tuna);
}
}

(The only difference is the "println") I get 5.28, the correct behavior.

Anyone know why this would happen, or is this the way it should be happening?

Answer 1

.println() automatically appends a newline, .print() does not.

System.out is a buffered stream; you need to .flush() for the result of .print() to appear (do it after you print, obviously). The newline in .println() causes the output to be flushed, which is why you don't need it there.