Question

用java编写一个程序:输出1-1000;输出格式为0001,0002.....1000

Answer 1

import java.text.DecimalFormat;
public class Demo{
public static void main(String[] args) {
for (int i = 0; i <= 1000; i++) {
System.out.println(new DecimalFormat("0000").format(i));
}
}
}

Answer 2

private static void out() {
for (int i = 1; i <= 1000; i++) {
if (i < 10) {
System.out.println("000" + i);
} else if (i < 100) {
System.out.println("00" + i);
} else if (i < 1000) {
System.out.println("0" + i);
} else {
System.out.println(i);
}
}
}

Answer 3

for (int i = 0; i < 1000; i++) {
System.out.println(new DecimalFormat("0000").format(i));
}