对java for 循环执行顺序的详解

for（表达式1;表达式2;表达式3）
{
 //循环体
}

for(int i=0;i<2;i++){
//TODO
}

    int[] arr = new int[3];  
    int j;
  arr[0] = 1;
  arr[1] = 2;
  arr[2] = 3;
  int searchKey = 3;
  for( j=0;j<arr.length ;j++){
   System.out.println("j1========="+j);
   if(arr[j] == searchKey){
    break;
   }
  }
  System.out.println("j2========="+j);

    int[] arr = new int[3];
		int j;
		arr[0] = 1;
		arr[1] = 2;
		arr[2] = 3;
		int searchKey = 4;
		for( j=0;j<arr.length ;j++){
		 System.out.println("j1========="+j);
		 if(arr[j] == searchKey){
		  break;
		 }
		}
		System.out.println("j2========="+j);