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Tag: java

Using a generic class to perform basic arithmetic operations

I want to perform basic arithmetic operations like addition, subtraction, multiplication and division using only one generic method per operation for wrapper types like Integer, Float, Double … (excluding BigDecimal and BigInteger). I have tried to do something like the following (for addition) using a …

Java Read Large Text File With 70million line of text

I have a big test file with 70 million lines of text. I have to read the file line by line. I used two different approaches: and Is there another approach that can make this task faster? Answer 1) I am sure there is no difference speedwise, both use FileInputStream internally and buffering 2) You can take mea…

alternative to GrantedAuthorityImpl() class

I want an alternative to GrantedAuthorityImpl() class. I want this in spring security implementation. GrantedAuthorityImpl() class is deprecated. Hence I want an alternative solution to it. My code : Answer The class GrantedAuthorityImpl has been deprecated – you can use SimpleGrantedAuthority instead:

Is there any library to Convert CAD to SVG? [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Questions asking us to recommend or find a book, tool, software library, tutorial or other off-site resource are off-topic for Stack Overflow as they tend to attract opinionated answers and spam. Instead, des…

Read data from SQLite where column name contains spaces

I am having a coulmn name called “condition name” (.sql file has been generated from server) But in android I am getting following exception while reading data from that table. 12-24 14:34:00.870: W/System.err(269): android.database.sqlite.SQLiteException: no such column: condition: , while compil…

How to create Java gradle project

How to create Java Gradle project from command line? It should create standard maven folder layout like on the picture below. UPDATE: .1. From http://www.gradle.org/docs/current/userguide/tutorial_java_projects.html I need to create file build.gradle with 2 lines .2. Add to build.gradle task below, than execu…

Drawing rectangles at an angle

What is a method in Java that draws a rectangle given the following: The coordinates of the center of the square The angle of the rectangle from vertical, in degrees Answer To draw a rectangle in the way you suggest you need to use the class AffineTransform. The class can be used to transform a shape in all m…