Solution for java puzzles(3)

/*What declaration turns this loop into infinitive loop.*/

public class Looper {
public static void main(String[] args) {
// Place your declaration for i here

while (i == i + 1) {
}
}
}

Solution:
// Place your declaration for i here
double i = 1.0/0.0

Solution for java puzzles(2)!

/*Provide declarations for the variables x and i such that*/

public class Tweedledum {
public static void main(String[] args) {
// Put your declarations for x and i here
x += i; // Must be LEGAL
x = x + i; // Must be ILLEGAL
}
}
solution:
// Put your declarations for x and i here
int x=0;
byte i;