Binary representation of 1 is 00000000000000000000000000000001 1 << 17 will move the last 1 in the binary representation 17 places left, which will result in 0000000000000100000000000000000, which when converted back to decimal results is 131072 solved Shift Operator (
Recursion is the act of a function calling itself. Under the hood function calls are pushed to the stack of the system and when a function finishes execution, it will be popped from the stack. A stack is a data structure which stores items and has the following operations: push: puts an item to the … Read more
Pass value of string to Activity2: button.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { String a = editText.getText().toString(); String b = editText2.getText().toString(); Intent intent = new Intent(your_activity.this, Activity2.class); intent.putExtra(“a_value”, a); intent.putExtra(“b_value”, b); startActivity(intent); } }); Retrieve the value in 2nd Activity: public String user1; public String user2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); … Read more
List<Date> date = new ArrayList<Date>(); date.add(new Date()); ez or date.add(user.getDate()); solved How to add date in ArrayList of “Date” data type? [closed]
Without more information the following is really only speculation. Please in the future show more details and explain what you have done to debug the problem. after new Thread, thread is still null and i don’t know why please help. It is not possible for a constructor to return a null so something else is … Read more
You have your method defined outside your class. Use this structure: public class MainActivity extends ActionBarActivity{ @Override protected void onCreate(Bundle savedInstanceState){ … } public void onAddClick(View a){ … } } solved what should i do with this error in code of addition of two numbers? [closed]
Via Window > Editor > Toggle Split Editor (Vertical) solved I accidentally duplicated this window, how do i undo it?
Instead of doing if (0.01=<spent && spent=<40) try if (0.01 <= spent && spent <= 40) 0 solved double value cannot be converted to boolean [closed]
If your ListView has more than one TextViews use something like this to retrieve the data list.setOnItemClickedListener(new OnItemClickedListener() { AdapterView<?> parent, View view, int position, long id){ Textview i1 = view.findViewById(R.id.t1); Textview i2 = view.findViewById(R.id.t2); String text = i1.getText()+i2.getText(); } } ; 2 solved Array List action listener [closed]
I would the use the indexOf method as follows: String s = new String(“I love my school. I love to play basketball. It is lovely weather. Love is life.”).toLowerCase(); System.out.println(s); int i = 0; int count = 0; System.out.print(“Counting love:”); while(i != -1) { i = s.indexOf(“love”); if(i != -1){ count++; s = s.substring(i+1); System.out.print(count+” … Read more
First of all: please only show relevant code. Other than that the answer is pretty simple. I suppose you want to implement several AI strategies and have the player choose which one to use. Have a class ComputerPlayer and give it a constructor public ComputerPlayer(Strategy s). This will determine which strategy to use, so store … Read more
int[][] sales = new int[6][8]; // a for (int i = 0; i < sales.length; i++) { int sum = 0; for (int j = 0; j < sales[i].length; j++) { sum += j; } System.out.println(“Location ” + String.valueOf(i) + ” has ” + String.valueOf(sum) + ” anvils sold”); } // b for (int i … Read more
What you might want to do is set your logic more like: System.out.println(“Press 1 for xx, 2 for xx, or 3 for xx”); if(scanner.hasNext()){ choice = scanner.Int(); } if(choice == 1){ //do whatever; } else if(choice == 2){ //do whatever; } I might not be understanding your question right but I think you need to … Read more
you have passed the same resource id listView = (ListView) findViewById(R.id.productlistview); View header = (View)getLayoutInflater().inflate(R.layout.productlistview, null); change this to listView = (ListView) findViewById(id1,null);//id1 for second xml specified View header = (View)getLayoutInflater().inflate(id2, null);//id2 for first xml specified 1 solved Java.NullPointerException Android [closed]
Welcome to Stack Overflow! Some suggestions for your question – please be sure to clean up the code that you post and only post relevant sections, it’s very hard to read cluttered code like this. And as Marc B said, it’s tough to tell what you’re actually asking, so please be clear in your question … Read more