Here is a Python to Java dictionary.
|   Python  |    Java  |    Meaning  |  
Java Return Type  |  
Python Return Type  |      
Java Precedence  |  
|---|---|---|---|---|---|
| a[i] | a[i] | ith element of array a | Type of array element  |  Type of array element  |  1 | 
| str(n) | n.toString( ) | dot operator | Return value of method  |  Return value of method  |  1 | 
| a ** n | Math.pow(a, n) | a raised to the n power | double | float | 2 | 
| not expr | !expr | if expr is
true, return false; if false, return true  | 
boolean | bool | 3 | 
| +5 | +5 | positive 5 (not usually used) | int or double | int or float | 3 | 
| -5 | -5 | negative 5 | int or double | int or float | 3 | 
| x * y | x * y | x multiplied by y | int or double | int or float | 4 | 
| x / y | x / y | x divided by y | int or double | int or float | 4 | 
| x % y | x % y | x mod y (remainder from integer division)  | 
int or double | int or float | 4 | 
| x + y | x + y | sum of x and y | int or double | int or float | 5 | 
| s + t | s + t | concatenation of s and t | String | string | 5 | 
| x - y | x - y | difference of x minus y | int or double | int or float | 5 | 
| x < y | x < y | x is less than y | boolean | bool | 6 | 
| x > y | x > y | x is greater than y | boolean | bool | 6 | 
| x <= y | x <= y | x is less than or equal to y | boolean | bool | 6 | 
| x >= y | x >= y | x is greater than or equal to y | boolean | bool | 6 | 
| x == y | x == y | x is equal to y | boolean | bool | 7 | 
| x != y | x != y | x is not equal to y | boolean | bool | 7 | 
| expr1 and expr2 | expr1 && expr2 | logical and | boolean | bool | 8 | 
| expr1 or expr2 | expr1 || expr2 | logical or | boolean | bool | 9 | 
| y = x | y = x; | assign value of x to y y <-- x  |  Type of x | Type of x | 10 | 
| y += x | y += x; | y <-- y + x | Type of x | Type of x | 10 | 
| y += 1 | y++; | y <-- y + 1 | Type of x | Type of x | 10 | 
| y -= x | y -= x; | y <-- y - x | Type of x | Type of x | 10 | 
| y -= 1 | y--; | y <-- y - 1 | Type of x | Type of x | 10 | 
| y *= x | y *= x; | y <-- y * x | Type of x | Type of x | 10 | 
| y /= x | y /= x; | y <-- y / x | Type of x | Type of x | 10 |