轻松做：
Scanner keyboard = new Scanner(system.in);
int startr, endr;
boolean good = false;
do
{
System.out.println("Enter the Starting Number of the Range: ");
startr = keyboard.nextInt();
if(startr % 10 == 0 && startr >= 0)
good = true;
else
System.out.println("Numbers is not divisible by 10");
}
while (!good);
good = false;
do
{
System.out.println("Enter the Ending Number of the Range: ");
endr = keyboard.nextInt();
if(endr % 10 == 0 && endr <= 1000)
good = true;
else
System.out.println("Numbers is not divisible by 10");
}
while (!good);
// do stuff
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