conversions.putAll(success); // you haven’t told us the key type, so I just use Key here for (Map.Entry<Key, Integer> entry : failed.entrySet()) { Key id = entry.getKey(); Integer old = conversions.get(id); if (old != null) { conversions.put(id, old + entry.getValue()); } else { conversions.put(id, entry.getValue()); } } 1 solved How should be this on java 7?
You should keep a reference of the position of each letter in the string. You can use the toCharArray method. String s = “ciao”; String underscore = s.replaceAll(“.”, “_ “).trim(); char[] sC = s.toCharArray(); if(s.contains(“a”){ StringBuilder myUnderscore = new StringBuilder(underscore); for(int i = 0; i < sC.length; i++){ if(sc[i] == ‘a’){ myUnderscore.setCharAt(i, ‘a’); } } … Read more
for (int j = 0; i < delSub.length;j++) Should be: for (int j = 0; j < delSub.length;j++) (note the “j <” instead of “i <“) 2 solved Out Of Bounds Expeption location (JAVA) [closed]
If you can work with a Map<String, Long> then you can use this: public Map<String, Long> countCodingsByDate() { return codingHistory.historyDate.stream() .collect(Collectors.groupingBy( Function.identity(), Collectors.counting() )); } Note: This is the normal way to find out the occurances of a Collection. For similar questions, see: 1, 2 2 solved Reworking method with stream usage [duplicate]
There are specific interfaces that must be implemented by classes that handle GUI events. Select the appropriate interface for the event you are interested in. Search for all classes implementing it. In each class, set a breakpoint or add logging in the overriding method that handles the event. Debug, and do the appropriate GUI action. … Read more
The solution is : for n=1: = 1 for n=2: = 1+2 => 1+2+3 => 1-2+3 for n=3: = 1+2 for n=4: = 1+2+3 => -1+2+3 for n=5: = 1+2+3 => 1+2+3+4-5 for n=6: = 1+2+3 for n=7: = 1+2+3+4=>1+2+3+4+5=>1+2+3-4+5 for any n, first calculate the S(k)=1+2+3+…+k where S(k)>n and x=S(k)-n is an even number. … Read more
Hey you are are getting exception on something like this code your_toggle_button.setChecked(true); The above code is in other class rather than your_toggle_button activity because you can’t touch your activity’s child if the activity is not running, to achieve this you will have to save your value in some variable and send it through intent when … Read more
Currently, they are two option existing: they are running a custom piece of software that support a jvm they are running a minimum version of a linux , just what’s enough to run the jvm, everything else is disabled / removed. It’s booting that fast because it has only the piece of code needed to … Read more
You are reading an int using Scanner.nextInt(): as described in the documentation, this uses Integer.parseInt to read the number; and that method explicitly states that it accepts a leading + sign: The characters in the string must all be digits of the specified radix (as determined by whether Character.digit(char, int) returns a nonnegative value), except … Read more
Well you can use java.util.Scanner.next() method. see the documentation next() Finds and returns the next complete token from this scanner. Scanner sc = new Scanner(System.in); String str = sc.next(); System.out.println(str); There are also plenty of other options available if you’re willing to switch from Scanner class. One possible option is using java.io.BufferedReader class. BufferedReader bi … Read more
You can use: float input1String = txtInput1.getText() == null ? 0.0f : Float.valueOf(txtInput1.getText().trim()); which can throw an exception if the value of yout Textfiled is not a float value 4 solved How can i change my Var to Float in GUI Java?
Executing a Static Block can be Achieved by using Custom Class Loader. ClassReload.java Class<?> load = ClassLoader.getSystemClassLoader().loadClass(“com.Hello”); //Assume Hello class is in “com” package load.newInstance().toString(); URL[] urls = { load.getProtectionDomain().getCodeSource().getLocation() }; ClassLoader delegateParent = load.getClassLoader().getParent(); try (URLClassLoader cl = new URLClassLoader(urls, delegateParent)) { Class<?> reloaded = cl.loadClass(load.getName()); reloaded.newInstance().toString(); } } } Refer Oracle Document for … Read more
You should check mysql DB – http://www.tutorialspoint.com/mysql/ And JDBC connection for connecting to mysql from Java – http://www.tutorialspoint.com/jdbc/jdbc-sample-code.htm solved Ways to store the data permanently [closed]
You switch it (see what I did there?) by writing something like this: switch(room.toUpperCase()) { case “P”: //do stuff for P break; case “S”: //do stuff for S break; ….. default: //do what’s in your “else” block break; } The switch statement decides which item to look at, then each case is for each outcome. … Read more
Use that Layout: <?xml version=”1.0″ encoding=”utf-8″?> <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android” android:orientation=”vertical” android:layout_width=”match_parent” android:layout_height=”match_parent”> <LinearLayout android:orientation=”vertical” android:layout_width=”match_parent” android:layout_height=”0dp” android:layout_weight=”0.90″> </LinearLayout> <LinearLayout android:orientation=”vertical” android:layout_width=”match_parent” android:layout_height=”0dp” android:layout_weight=”0.10″ android:background=”#ffFF9800″ android:layout_gravity=”center_vertical”> <LinearLayout android:orientation=”horizontal” android:layout_width=”wrap_content” android:layout_height=”match_parent” android:layout_gravity=”right” android:layout_marginRight=”20dp”> <TextView android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:text=”LOG IN >” android:id=”@+id/textView76″ android:textSize=”20sp” android:textColor=”#fff” android:layout_gravity=”center_vertical”/> </LinearLayout> </LinearLayout> </LinearLayout> 2 solved Rectangle at the bottom of the activity