「java数组打印菱形」打印一个菱形java
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本文目录一览：
java打印一个菱形
我给你简单地写了下注释，你看一下
public class test2 {
public static void main(String args[]) {
//打出前四层星
for (int i = 1; i = 7; i += 2) {
//打出空格
for (int kong = 7; kong i - 1; kong--) {
System.out.print(" ");
}
//打出星+空格
for (int xing = 1; xing = i; xing++) {
System.out.print("* ");
}
System.out.println();
}
//打出后三层星
for (int j = 1; j = 5; j += 2) {
//打出空格
for (int kong1 = 1; kong1 j + 3; kong1++) {
System.out.print(" ");
}
//打出星+空格
for (int xing1 = 5; xing1 = j; xing1--) {
System.out.print("* ");
}
//换行
System.out.println();
}
}
}
祝学习进步！
java 怎样写出一个菱形程序？空心和实心
java打印菱形通过二维数组来打印，实例如下：
int hangshu = 11;
int yiban = hangshu / 2 + 1;
int yibanduo = hangshu / 2;
System.out.println("空心菱形：");
for(int k = 1;k = yiban;k++){
for(int i = 1;i = (yiban - k);i++){
System.out.print(" ");
}
System.out.print("*");
for(int i = 1;i = ( (k - 2) * 2 + 1);i++){
System.out.print(" ");
}
if(k != 1){
System.out.print("*");
}
System.out.println();
}
for(int k = yibanduo;k =1;k--){
for(int i = 1;i = (yiban - k);i++){
System.out.print(" ");
}
System.out.print("*");
for(int i = 1;i = ( (k - 2) * 2 + 1);i++){
System.out.print(" ");
}
if(k != 1){
System.out.print("*");
}
System.out.println();
}
System.out.println("实心菱形：");
for(int i = 1;i = hangshu;i++){
if(i = hangshu/2 + 1){
for(int k = 1;k = hangshu/2 + 1- i;k++){
System.out.print(" ");
}
for(int k = 1;k = i;k++){
System.out.print("* ");
}
System.out.println();
}else{
for(int k =1;k = (i -(hangshu/2 + 1));k++){
System.out.print(" ");
}
for(int k = 1;k = (2 *(hangshu/2 + 1) - i);k++){
System.out.print("* ");
}
System.out.println();
}
}
结果如下：
怎么用java打印菱形？
java打印菱形方法：
package circulationDemo;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入要打印的行数：");
int num = input.nextInt();
t1(num);// 正直角
split();
t2(num);// 倒直角
split();
t3(num);// 等腰三角
split();
t4(num);// 等腰倒三角++
split();
t5(num);// 等腰倒三角--
split();
t6(num);// 实心菱形
split();
t7(num);// 空心菱形(1)
split();
t8(num);// 空心菱形(2)
split();
t9(num);// 空心菱形(3)
}
private static void t9(int num) {
for (int k = 1; k = num; k++) {
for (int i = 1; i = (num - k); i++) {
System.out.print(" ");
}
System.out.print("*");
for (int i = 1; i = ((k - 2) * 2 + 1); i++) {
System.out.print(" ");
}
if (k != 1) {
System.out.print("*");
}
System.out.println();
}
for (int k = num-1; k = 1; k--) {
for (int i = 1; i = (num - k); i++) {
System.out.print(" ");
}
System.out.print("*");
for (int i = 1; i = ((k - 2) * 2 + 1); i++) {
System.out.print(" ");
}
if (k != 1) {
System.out.print("*");
}
System.out.println();
}
}
private static void t8(int num) {
// 上半部分
for (int i = 1; i = num; i++) {
// 打印上半部分空格
for (int j = 1; j = num - i; j++) {
System.out.print(" ");
}
// 打印原本实心的*部分
for (int j = 1; j = 2 * i - 1; j++) {
// 仅在一行的开头和末尾打印*
if (j == 1 || j == 2 * i - 1) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
System.out.println();
}
// 下半部分
for (int i = 1; i = num - 1; i++) {
for (int j = 1; j = i; j++) {
System.out.print(" ");
}
for (int j = 1; j = 2 * (num - i - 1) + 1; j++) {
if (j == 1 || j == 2 * (num - i - 1) + 1) {
System.out.print("*");
} else {
System.out.print(" ");
}
}
System.out.println();
}
}
private static void t7(int num) {
// 打印上半部分
for (int i = 1; i = num; i++) {
// 打印空格
for (int j = 1; j = (num - i); j++) {
System.out.print(" ");
}
// 打印*的个数
if (i == 1) {
System.out.print("*");
} else {
System.out.print("*");
// 打印菱形里的空格
for (int j = 1; j = (2 * i - 3); j++) {
System.out.print(" ");
}
System.out.print("*");
}
System.out.println();
}
// 打印下半部分
for (int i = num - 1; i 0; i--) {
// 打印空格
for (int j = 1; j = (num - i); j++) {
System.out.print(" ");
}
// 打印*的个数
if (i == 1) {
System.out.print("*");
} else {
System.out.print("*");
// 打印菱形里的空格
for (int j = 1; j = (2 * i - 3); j++) {
System.out.print(" ");
}
System.out.print("*");
}
System.out.println();
}
}
private static void t6(int num) {
// 上半部分
for (int i = 1; i = num; i++) {
for (int j = 1; j = num - i; j++) {
System.out.print(" ");
}
for (int j = 1; j = 2 * i - 1; j++) {
System.out.print("*");
}
System.out.println();
}
// 下半部分
for (int i = 1; i = num - 1; i++) {
for (int j = 1; j = i; j++) {
System.out.print(" ");
}
for (int j = 1; j = 2 * (num - 1 - i) + 1; j++) {
System.out.print("*");
}
System.out.println();
}
}
private static void t5(int num) {
for (int i = num; i 0; i--) {
for (int j = 1; j = num - i; j++) {
System.out.print(" ");
}
for (int j = 1; j = 2 * i - 1; j++) {
System.out.print("*");
}
System.out.println();
}
}
private static void t4(int num) {
for (int i = 1; i = num; i++) {
for (int j = 1; j = i - 1; j++) {
System.out.print(" ");
}
for (int j = 1; j = 2 * (num - i) + 1; j++) {
System.out.print("*");
}
System.out.println();
}
}
private static void t3(int num) {
for (int i = 1; i = num; i++) {
for (int j = 1; j = num - i; j++) {
System.out.print(" ");
}
for (int j = 1; j = 2 * i - 1; j++) {
System.out.print("*");
}
System.out.println();
}
}
private static void split() {
System.out.println("---------------");
}
private static void t2(int num) {
for (int i = 1; i = num; i++) {
for (int j = 1; j = num - i + 1; j++) {
System.out.print("*");
}
System.out.println();
}
}
private static void t1(int num) {
for (int i = 1; i = num; i++) {
for (int j = 1; j = i; j++) {
System.out.print("*");
}
System.out.println();
}
}
}
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