1.package finish;
public class csy {
public static void main(String[] args) {
for (int i = 100; i <= 999; i++) {
int a = i / 1 % 10;//个位
int b = i / 10 % 10;//十位
int c = i / 100;//百位
if (a * a * a + b * b * b + c * c * c == i) {
System.out.print(i + " ");
}
}
}
}
2.package finish;
public class csy {
public static void main(String[] args) {
for(int i=1;i<=6;i++){
for (int j=1;j<=i;j++){
System.out.print(j);
}
System.out.println();
}
}
}
package finish;
public class csy {
public static void main(String[] args) {
for(int i=1;i<=6;i++){
for (int j=1;j<=7-i;j++){
System.out.print(j);
}
System.out.println();
}
}
}
package finish;
public class csy {
public static void main(String[] args) {
for(int i=1;i<7;i++) {
for (int k = 1; k <7-i ; k++) {
System.out.print(" ");
}
for(int j=i;j>0;j--) {
System.out.print(j);
}
System.out.println();
}
}
}
package finish;
public class csy {
public static void main(String[] args) {
for(int i=6;i>0;i--) {
for(int k=0;k<6-i;k++) {
System.out.print(" ");
}
for(int j=1;j<=i;j++) {
System.out.print(j);
}
System.out.println("");
}
}
}
3.package finish;
import java.util.*;
public class csy {
public static void main(String[] args) {
int day=0;
int month=0;
int year=0;
int sum=0;
int leap;
System.out.println("请输入年,月,日");
Scanner csy=new Scanner(System.in);
year=csy.nextInt();
month=csy.nextInt();
day=csy.nextInt();
switch(month)
{
case 1:
sum=0;break;
case 2:
sum=31;break;
case 3:
sum=59;break;
case 4:
sum=90;break;
case 5:
sum=120;break;
case 6:
sum=151;break;
case 7:
sum=181;break;
case 8:
sum=212;break;
case 9:
sum=243;break;
case 10:
sum=273;break;
case 11:
sum=304;break;
case 12:
sum=334;break;
default:
System.out.println("请正确的输入年,月,日");break;
}
sum=sum+day;
if(month>=0&&month<=12&&day>=1&&day<=31)
{
if(year%400==0||year%4==0&&year%100!=0)
{ leap=1;
}else{
leap=0;
}
if(leap==1&&month>2)
{
sum++;
System.out.println(year+"年"+month+"月"+day+"号是这一年的第"+sum+"天。");
}else {
System.out.println(year+"年"+month+"月"+day+"号是这一年的第"+sum+"天。");
}
}
}
}
4.package finish;
import java.util.*;
public class csy {
public static void main(String[] args) {
int a, b, c, d, e, x;
Scanner sc = new Scanner(System.in);
System.out.println("输入数字:");
e = sc.nextInt();
a = e / 1000;
b = e / 100 % 10;
c = e / 10 % 10;
d = e % 10;
x = d * 1000 + c * 100 + b * 10 + a;
System.out.println("反转后数为:" + x);
}
}