The default value for objects is null; I believe this would apply to a String, too, since Strings are objects.
There are lots of examples of string formatting in Java. It can be difficult at times. Some of these examples are, but are not limited to; align, string, format, and JAVA.
parseInt is a method in the Integer class in java and is used to parse string values into integer numbers. ex: int i = Integer.parseInt("10"); After the above line of code, the variable i will be assigned a value of 10 which is the numeric value of the string passed as argument to the parseInt method
The same way you would in a regular java program. int i = 10; String s = i + ""; after the above line of code the variable s will have "10" as a string value...
A null pointer exception in java comes when you are trying to perform any action on an object that isnt initialized/has a value i.e., is a NULL Value Ex: private String s; //declare a string if(s.equals("test")){ //do something.. } You will get a null pointer in the if condition because you are checking a value that is null which is not allowed..
To have a string split in Java means that a string array, containing substrings (can be delimited by elements of a specified string or Unicode character array), is returned.
Here is some sample code to convert a string into a boolean: String word = "true"; boolean boo; if (word.equalsIgnoreCase("true")) boo=true; else boo=false;
When referring to computer terms, the phrase "java string replace" means that a string in the line of code that Java uses, is being replaced, or needs to be replaced.
String is a pre-defined class in Java. For example: String s = new String("This is a string"); the variable s is now a String object since it was declared and initialized in the String class.
The string trim works in Java by trimming white space from the beginning and end of a string. It cleans up the string and makes makes it neater for the users of the program.
The difference between 'a' and "a" anywhere in Java is that 'a' is a primitive char type, while "a" is a String object.
String[] myStringArray = { "abc","def","xyz" }; You can access elements of this array by using the [index] operation. Ex: myStringArray[0] will contain value "abc" and myStringArray[1] will contain value "def" and so on...
Java always follows a pass by value approach.