--------------------- Android training, Java training, and hope to communicate with you! ---------------------- 1. for arrays, arrays of the same element type and dimension belong to the same class (same bytecode), for example, int [] a1 = new int [] {, 3 }; int [] a2 = new int [] {1, 2, 3, 4, 5}; string a3 = new string [] {"22", "33 "}; a1 and A2 belong to the same classa1 and A3, not the same class. 2. assign values between arrays to object obj1 [] = A1; // The error object obj2 [] = A3; // Why Is this correct? Originally, the value assignment of array objects is the assignment of corresponding elements respectively. After Statement 2 is executed, there are two object-type objects in obj2. If Statement 1 assigns values in this mode, it assigns three int-type values to the object. However, the native data type is not a subclass of the object and therefore cannot be assigned a value, so it is wrong (the package class is not automatically packed here and then assigned a value ). 3. all arrays are subclasses of objects. Object OBJ = A1; // 4 is acceptable. quickly print out an Array Using arrays. aslist (A1); convert the array to list and print it directly. Note: The receiving parameter is a variable parameter. When an array of non-native data type is input, it is automatically split into list elements; when the input is an array of native data type (such as int []), it will not be automatically split and will only be used as an element in the list, that is, the array itself. -------------------- Android training, Java training, and hope to communicate with you! ---------------------- For details, please refer to: http://edu.csdn.net/heima
