Arraycopy method does not allocate memory space for target array. target array must have already been created with its memory space allocated. example: system. arraycopy(sourcearray, 0, targetarray, 0, source. length); //differences between passing values of variables of primitive data types and pass arrays.for an argument of a primitive type, the argument’s value is passed.argument of an array type, the value of the argument is a reference to an array; the reference value is passed to the method. or simply pass by sharing. thus, if you change the array in the method, you will see the change outside the method. createarraymethod can generates an array of 100 random lowercase letters

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;