public class OutputNum { public static void main(String[] args){ int line = 4;//输出行数(可改变line来控制输出行数) int n, d; for(int i = 1; i <= line; ++i){ n = 1; d = 1; for(int j = 0; j < line - i; ++j) System.out.print(" "); while(n > 0){ System.out.print(n + " "); if(n == i) d = -1; n += d; } System.out.println();
} } } 1 1 2 1 1 2 3 2 1 1 2 3 4 3 2 1
public class tezx { public static void main(String[] args) { Scanner input=new Scanner(System.in); System.out.println("请输入一个数"); int num=input.nextInt(); for(int i=1;i<=num;i++){ for(int j=1;j<=num-i;j++){ System.out.print(" "); } for(int j=1;j<=i;j++){ System.out.print(j); } if(i>1){ for(int j=i-1;j>=1;j--){ System.out.print(j); } System.out.println(); }else{ System.out.println(); }
} }}
for example int n = 4; for (int i=0; i<n; i++) { String format = "%" + String.format("%ds", 2*(n-i)-1); System.out.printf(format, " "); for (int j=1; j<2*(i+1); j++) { if (j <= i) { System.out.printf("%d ", j); } else { System.out.printf("%d ", 2*(i+1)-j); } } System.out.println(); }
public class TestPromt { public static void main(String arga[]) { int initNum = 5; for (int i = 1; i <= initNum; i++) { format(initNum ,i); generator(i); } } public static void generator(int i) { StringBuffer sb = new StringBuffer(); String myString = ""; for (int t = 1; t < i; t++) { sb.append(t).append(" "); } sb.append(i); myString = sb.toString(); sb.reverse().delete(0,String.valueOf(i).length()); System.out.println(myString + sb.toString()); } public static void format(int initNum ,int i){ for (int k = 2 * (initNum -i); k > 0; k--) System.out.print(" "); }}
for(int i = 1;i<=4;i++){
for(int j = 4;j>=1;j--){
if(j>i){
System.out.print(" ");
}else{
System.out.print(i+1-j);
}
}
for(int k = 1;k<i;k++){
System.out.print(i-k);
}
System.out.println();
}这个可以实现,不过不太完美,可以再优化。
public class OutputNum {
public static void main(String[] args){
int line = 4;//输出行数(可改变line来控制输出行数)
int n, d;
for(int i = 1; i <= line; ++i){
n = 1;
d = 1;
for(int j = 0; j < line - i; ++j)
System.out.print(" ");
while(n > 0){
System.out.print(n + " ");
if(n == i)
d = -1;
n += d;
}
System.out.println();
}
}
}
1
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.println("请输入一个数");
int num=input.nextInt();
for(int i=1;i<=num;i++){
for(int j=1;j<=num-i;j++){
System.out.print(" ");
}
for(int j=1;j<=i;j++){
System.out.print(j);
}
if(i>1){
for(int j=i-1;j>=1;j--){
System.out.print(j);
}
System.out.println();
}else{
System.out.println();
}
}
}}
int n = 4;
for (int i=0; i<n; i++) {
String format = "%" + String.format("%ds", 2*(n-i)-1);
System.out.printf(format, " ");
for (int j=1; j<2*(i+1); j++) {
if (j <= i) {
System.out.printf("%d ", j);
} else {
System.out.printf("%d ", 2*(i+1)-j);
}
}
System.out.println();
}
public class TestPromt { public static void main(String arga[]) { int initNum = 5; for (int i = 1; i <= initNum; i++) {
format(initNum ,i);
generator(i);
} } public static void generator(int i) {
StringBuffer sb = new StringBuffer();
String myString = "";
for (int t = 1; t < i; t++) {
sb.append(t).append(" ");
}
sb.append(i);
myString = sb.toString();
sb.reverse().delete(0,String.valueOf(i).length());
System.out.println(myString + sb.toString());
}
public static void format(int initNum ,int i){
for (int k = 2 * (initNum -i); k > 0; k--)
System.out.print(" ");
}}