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()
}
回答于 2022-12-14java打印菱形通过二维数组来打印，实例如下：
int hangshu = 11int yiban = hangshu / 2 + 1
int yibanduo = hangshu / 2
System.out.println("空心菱形：")
for(int k = 1k <= yibank++){
for(int i = 1i <= (yiban - k)i++){
System.out.print(" ")
}
System.out.print("*")
for(int i = 1i <= ( (k - 2) * 2 + 1)i++){
System.out.print(" ")
}
if(k != 1){
System.out.print("*")
}
System.out.println()
}
for(int k = yibanduok >=1k--){
for(int i = 1i <= (yiban - k)i++){
System.out.print(" ")
}
System.out.print("*")
for(int i = 1i <= ( (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 = 1i <= hangshui++){
if(i <= hangshu/2 + 1){
for(int k = 1k <= hangshu/2 + 1- ik++){
System.out.print(" ")
}
for(int k = 1k <= ik++){
System.out.print("* ")
}
System.out.println()
}else{
for(int k =1k <= (i -(hangshu/2 + 1))k++){
System.out.print(" ")
}
for(int k = 1k <= (2 *(hangshu/2 + 1) - i)k++){
System.out.print("* ")
}
System.out.println()
}
}
结果如下：
