Looking for keys of print a diamond

Question

ladies and gentlman:I'm new to java,When I doing my homework,there is a easy but hard-to-be-understand question really bothers me,so I come to looking for help.I will be appricatied your coming and answering.
Print a Diamond ----easy and old question!
here are my two keys,but i dont belive any of them is OOP,i mean,there is no object -oriented in the code and progamming,maybe just progressing.if there any brief key to the question or any explanation to a new java learner,I will really be thanks.
1st
public class LingXing{
     public static void main(String args[]){
          for (int i=0;i<=6;i++){
          for (int j=0;j<=6;j++){
               if (j>6-i)     
          System.out.print("*");
               else
          System.out.print(" ");
          for (int j=6-i;j<=6;j++){     
          System.out.print("*");
          System.out.println();
          for (int i=1;i<=6;i++){
          for (int j=1;j<=7;j++){
               if (j-1>i)     
          System.out.print("*");
               else
          System.out.print(" ");
          for (int j=i;j<=6;j++){     
          System.out.print("*");
          System.out.println();
2nd
public class Ling{
     public static void main(String args[]){
     for(int i=1;i<=7;i++){
          for(int j=1;j<=7;j++){
          if((i>7-j)&&(i>=j)){
                         System.out.print("*");
          else{
                         System.out.print(" ");          
     System.out.println();
     for(int i=1;i<=7;i++){
          for(int j=1;j<=7;j++){
          if((i<j)&&(8-i>j)){
                         System.out.print("*");
     else{
                         System.out.print(" ");                    
          System.out.println();
}

Answer 1

how about this????
this is object oriented approach......
public class Ling{
void alpha()
for(int i=1;i<=7;i++){
for(int j=1;j<=7;j++){
if((i>7-j)&&(i>=j)){
System.out.print("*");
else{
System.out.print(" ");
System.out.println();
for(int i=1;i<=7;i++){
for(int j=1;j<=7;j++){
if((i<j)&&(8-i>j)){
System.out.print("*");
else{
System.out.print(" ");
System.out.println();
public static void main(String as[])
Ling l = new Ling();
l.alpha();
}