String character interchange in java

class str
{
public static void main(String args[])
{
String s="this is lecture class";
char temp;
String a[]=s.split(" ");

System.out.println("..........the String  are  ...... ");

for(int i=0;i<a.length-1;i++)
{
System.out.print("  "+a[i]);

}


System.out.println("  ");

for(int i=0;i<a.length-1;i++)
{
char p[]=a[i].toCharArray();
for(int j=0;j<p.length-1;j=j+2)
 {
  temp=p[j];
  p[j]=p[j+1];
  p[j+1]=temp;

}

 a[i]=new String(p);

}

System.out.println("..........the String after interchange of character ...... ");
for(int i=0;i<a.length-1;i++)
{
System.out.print("  "+a[i]);

}





}
}