What is FontMetrics?
The FontMetrics class defines a font metrics object, which encapsulates information about the rendering of a particular font on a particular screen.
What is Toolkit in Java?
15.1 Toolkit. The Toolkit object is an abstract class that provides an interface to platform-specific details like window size, available fonts, and printing. Every platform that supports Java must provide a concrete class that extends the Toolkit class. The Sun JDK provides a Toolkit for Windows NT/95 (sun. awt.
How do you change the size of a string in Java?
First create your g (or g2d) drawstring object String string = “Hello World”; then create a Font object Font stringFont = new Font( “SansSerif”, Font. PLAIN, 18 ); Next set the Font object to the g or g2d object g2d. setFont( stringFont ); Now apply the g2d (or g) object to your drawstring object g2d.
What is a font bounding box?
Font bounding box: This is the smallest rectangle enclosing the shape that would result if all of the glyphs of the font were placed with their origins coincident and then filled.
What is Java Deployment toolkit?
The Java DT is a very useful tool, used by Java applets and applications to help manage getting the right version of Java for a user’s system. For developers, it also provides a JavaScript interface. The interface automatically generates the HTML code that is required to deploy Rich Internet Applications (RIAs).
Can memory leak in Java?
In general, a Java memory leak happens when an application unintentionally (due to logical errors in code) holds on to object references that are no longer required. These unintentional object references prevent the built-in Java garbage collection mechanism from freeing up the memory consumed by these objects.
What is max size of string in Java?
2147483647
String is considered as char array internally,So indexing is done within the maximum range. This means we cannot index the 2147483648th member.So the maximum length of String in java is 2147483647.
Which is lighter AWT or Swing?
Since AWT is heavyweight, each AWT Button has a corresponding MFC button on the windows platform, or Motif button on a Unix platform. Since Swing is lightweight, the graphics of the button is just drawn on top of the frame…
How do you deploy a Java program?
To deploy your Java Web Start application, first compile the source code, package it as a JAR file, and sign the JAR file. Java Web Start applications are launched by using the Java Network Launch Protocol (JNLP). Hence, you must create a JNLP file to deploy your application.
How do I enable Java Deployment Toolkit?
I guess the deployment toolkit is the one listed as Java — Vulnerable plugin!…Use at your own risk!
- Type about:config into Location bar.
- Proceed by clicking the button “I’ll be careful, I promise!”.
- Rightclick, to toggle the string extensions. blocklist. enabled from true to false.
- Restart Firefox.
Why heap dumps are created?
A heap dump is a snapshot of all the objects that are in memory in the JVM at a certain moment. They are very useful to troubleshoot memory-leak problems and optimize memory usage in Java applications. Heap dumps are usually stored in binary format hprof files.
How much data can a string store?
MAX_VALUE, which is 2^31 – 1 (or approximately 2 billion.) So you can have a String of 2,147,483,647 characters, theoretically.