Is Java pass by value or pass by reference?

I understand in Java when you pass one of the eight primitive data types to a method, you are passing by value, but when you pass an object you pass by reference. I'm somewhat confused why in this short java program why the string object still retains...

I want to assign the pointers in my array a value. So I can do this: int height = 5; int **int_array_pointer = (int *) main_pointer; //a casted pointer; irrelevant to question) int_array_pointer[0] = &height; //pass by reference Or *int_array_pointer...

void swap(int a,int b) I try to implement this method in Java,never works,how to pass by reference in Java

If i want a funcion's parameter to never alter the runtime value passed by the caller program should i use pass by value or pass by reference parameter? thank you

[code] void fun(char **a)   {    //some modification ... each character X will be replaced by 'A' //return nothing } main() {    char **a;  // a 3x3 char array  // initiallize all values with  character 'X'    print a   //print 3 rows each containing...