Java problem-Whats the reason behind and what will be probable output

Question

1.)

long milli=24*60*60*1000;
long micro=24*60*60*1000*1000;
long result=micro/milli;

The result should be 1000 but it's not.

Please can you tell me the output and explain it?

2)

int i=0;
for(a=0;a<=integer.MAX_VAL;a++)
{
    i++;
}

S.O.P(i);

Normally it went to infine loop why because there is max value it should come out of loop. At what conditions it will executed sucessfully and what will be excepted value. .....Anyone can tell me about VM... handing of nummbers in JAVA

Answer 1

您需要在其中放置一个L以进行长时间转换

long micro=24*60*60*1000*1000L

Answer 2

2)

public class test {
    public static void main(String[] ar){
        int i=0;
        for(int a=0; a< Integer.MAX_VALUE;a++) {
            i++;
        }
        System.out.println(i);
    }
}

output:

2147483647

Answer 3

This feels jeopardy, having to guess the question as well as the answer. ;)

I think the second question should read

int i=0;
for(a=0;a<=Integer.MAX_VALUE;a++)
    i++

This will go into an infinite loop because all possible values of a are <= MAX_VALUE.

You can re-write this loop as

int a=0;
do {
    i++
} while (a++ != Integer.MAX_VALUE);

i will be Integer.MIN_VALUE as it overflows.