Java求程序代码
public class TestStar {
public static void main(String[] args) {
String star = "*";
for (int i = 0; i < 5; i++) {
if (i == 0) {
System.out.print(" " + star);
System.out.println();
}
if (i == 1) {
for (int z = 0; z < 4; z++) {
System.out.print(" " + star);
}
System.out.println();
}
if (i == 2) {
System.out.print(" ");
for (int x = 0; x < 3; x++) {
System.out.print(" " + star);
}
System.out.println();
}
if (i == 3) {
for (int y = 0; y < 2; y++) {
System.out.print(" " + star + " ");
}
}
}
}
}
是好使的 但是我没找到画五角星有什么规律（五角星好象不是正规图形吧？）如果还有什么要求的话 补充问题(如果是用*填充所有的东西 不包括 “ ”的话 我可以重新再给你写一个)
public class Demo3 {
public static void main(String[] args) {
byte a =1;
short b=1;
int c = 1;
long d = 1l;
float e=1f;
double f =1;
char g ='1';
boolean h = true;
System.out.println("byte a ="+a);
System.out.println("short b="+b);
System.out.println("int c ="+c);
System.out.println("long d ="+d);
System.out.println("float e="+e);
System.out.println("double f ="+f);
System.out.println("char g ="+g);
System.out.println("boolean h ="+h);
int x=a%b;
long y = c+d;
boolean z=(b==c);
System.out.println("int x="+x);
System.out.println("long y"+y);
System.out.println("boolean z"+z);
}
}
按照你的要求编写的Java程序如下
import java.util.Scanner;
public class S{
public static void main(String[] args){
int n=5;
int[] a=new int[n];
System.out.print("请输入"+n+"个正整数:");
Scanner sc=new Scanner(System.in);
for(int i=0;i<n;i++){
a[i]=sc.nextInt();
}
System.out.print("其中的偶数为:");
for(int i=0;i<n;i++){
if(a[i]%2==0){
System.out.print(a[i]+" ");
}
}
}
}
package org.jeecg;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Scanner;
public class ttt{
public static void main(String args[ ]) {
List<Integer> numArr = new ArrayList<>();
Scanner sc=new Scanner(System.in);
int a = 0;
int x = 0;
String yn = "N";
while (true){
a++;
System.out.print("请输入第"+a+"个正整数:");
x = sc.nextInt();
if (x < 0){
System.out.println("请不要输入负数");
a--;
continue;
}else {
numArr.add(x);
}
System.out.print("请问是否需要结束输入？（Y/N）");
yn = sc.next();
if (yn.toUpperCase(Locale.ROOT).equals("Y")){
break;
}
}
System.out.print("输入的数字为:");
numArr.forEach(num->{
System.out.print(num + " ");
});
System.out.println();
System.out.print("其中的偶数为:");
for(int i=0;i<numArr.size();i++){
if(numArr.get(i)%2==0){
System.out.print(numArr.get(i)+" ");
}
}
}
}
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答：按照你的要求编写的Java程序如下 import java.util.Scanner;public class S{ public static void main(String[] args){ int n=5;int[] a=new int[n];System.out.print("请输入"+n+"个正整数:");Scanner sc=new Scanner(System.in);for(int i=0;i<n;i++){ a[i]=sc.nextInt();}...
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