Replace substring in a string In this article we are going to make a java program to replace substring in a string . we will be asking the user to input a base string, than we will ask for a substring ...

In CI pipeline: java.lang.NullPointerException: Cannot invoke method substring() on null object at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java ...

String method: Method function: trim() removes whitespace before the Java String’s length method is called: charAt(int index) Returns the character at a given position in a String: toUpperCase() ...