Java编程之双重循环打印图形

public static void main(String[] args) {  // TODO Auto-generated method stub  int num=0;  System.out.println("请输入直角三角形的行数:");  Scanner input=new Scanner(System.in);  num=input.nextInt();  for(int i=1;i<=num;i++){    for(int k=1;k<=num-i+1;k++){      System.out.print("*");    }    System.out.print("/n");  }}

public static void main(String[] args) {  int rows=0;  System.out.println("请输入要求的三角形的行数:");  Scanner input=new Scanner(System.in);  rows=input.nextInt();  for(int i=1;i<=rows;i++){    for(int j=1;j<=2*i-1;j++){      System.out.print("*");    }    System.out.print("/n");  }}

public static void main(String[] args) {  int num=0;  System.out.println("请输入三角形所需要的行数:");  Scanner input=new Scanner(System.in);  num=input.nextInt();  for(int i=1;i<=num;i++){    for(int k=num;k>num-i+1;k--){      System.out.print(" ");    }    for(int j=num;j>=i;j--){      System.out.print("*");    }    System.out.println();  }  System.out.println();}

public static void main(String[] args) {  int num=0;  System.out.println("请输入打印的三角形行数:");  Scanner input=new Scanner(System.in);  num=input.nextInt();  for(int i=1;i<=num;i++){    for(int k=num;k>0;k--){      if(k<=i){        System.out.print("*");      }else{        System.out.print(" ");      }    }    System.out.println();  }}

public static void main(String[] args) {  int num=0;  System.out.println("请输入要打印三角形的行数:");  Scanner input=new Scanner(System.in);  num=input.nextInt();  for(int i=1;i<=num;i++){    for(int k=0;k<=num-i;k++){      System.out.print(" ");    }    for(int j=1;j<=2*i-1;j++){      System.out.print("*");    }    System.out.print("/n");  }}

public static void main(String[] args) {  int num=0;  System.out.println("请输入要求的三角形行数:");  Scanner input=new Scanner(System.in);  num=input.nextInt();  for(int i=1;i<=num;i++){    for(int m=num-1;m>num-i;m--){      System.out.print(" ");    }    for(int j=num;j>=i;j--){      System.out.print("* ");    }    System.out.println();  }}

public static void main(String[] args) {  for(int i=0;i<5;i++){      for(int j=0;j<5;j++){      System.out.print("*");    }    System.out.print("/n");  }}

public static void main(String[] args) {   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();       }       } }

public static void main(String[] args) {   for (int i = 0; i < 5; i++) {//打印行       for (int j = 0; j < 4-i; j++) {//打印空格         System.out.print(" ");//引号中间加空格       }       for (int j = 0; j < 6; j++) {//打印列         System.out.print("*");       }       System.out.println();//换行     } }

public static void main(String[] args) {  int num=9;  for(int i=1;i<=num;i++){    for(int j=1;j<=i;j++){      System.out.print(j+"*"+i+"="+j*i+" ");    }    System.out.println();  }}

public class TestNineNine {	public static void main(String[] args) {		for (int b=1;b<=9;b++) {			for (int a=1;a<=9;a++) {				int c = a*b;				System.out.print(c+"/"+a+"="+b+"/t");			}			System.out.println();		}	}