循环打印四个图案

一、

package com.im;

public class Demo5181 {

public static void main(String[] args) {
// TODO Auto-generated method stub

for(int i=1; i<=6; i++){
for(int j=1; j<=i; j++){
System.out.print(j+" ");
}
System.out.println();
}
}

}



二、

package com.im;

public class Demo5182 {

public static void main(String[] args) {
// TODO Auto-generated method stub

for(int i=6; i>=1; i--){
for(int j=1; j<=i; j++){
System.out.print(j+" ");
}
System.out.println();
}
}

}



三、

package com.im;

public class Demo5183 {

public static void main(String[] args) {
// TODO Auto-generated method stub

for(int i=1; i<=6; i++){
for(int k=6; k>=i; k--){
System.out.print("  ");
}
for(int j=i; j>=1; j--){
System.out.print(j+" ");
}
System.out.println();
}
}

}



四、

package com.im;

public class Demo5184 {

public static void main(String[] args) {
// TODO Auto-generated method stub

for(int i=6; i>=1; i--){
for(int k=6; k>=i; k--){
System.out.print("  ");
}
for(int j=1; j<=i; j++){
System.out.print(j+" ");
}
System.out.println();
}
}

}