The short answer is: Yes, it is defined: scanf will attempt to convert a sequence of bytes from stdin as an integer written in base 10 with optional initial spaces and an optional sign. If successful, the number will be stored into x. scanf will then perform these steps a second time. The return value … Read more
You can use a NavigationFilter for this. Here is an example to get you started: import java.awt.event.*; import javax.swing.*; import javax.swing.text.*; public class NavigationFilterPrefixWithBackspace extends NavigationFilter { private int prefixLength; private Action deletePrevious; public NavigationFilterPrefixWithBackspace(int prefixLength, JTextComponent component) { this.prefixLength = prefixLength; deletePrevious = component.getActionMap().get(“delete-previous”); component.getActionMap().put(“delete-previous”, new BackspaceAction()); component.setCaretPosition(prefixLength); } public void setDot(NavigationFilter.FilterBypass fb, int … Read more