Recent questions tagged java

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I want a table that has a combo as one of its columnheaders. I already found out that it is impossible with ... any way this can be achieved? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Generics <? super A> doesn't allow superTypes of A to be added to the list

I am using wildcard and lower bound generics on list and yet compiler is throwing error. Code: int intStart = ... should be getting above error. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - equals and hashCode of these entities (Spring MVC + Hibernate)

Someone can please suggest me how I can do equals and hashCode methods of these entities? This is a many-to-many relationship ... null) { if (other.agenzia != null) return false;...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Resizing image to fit in JLabel

I am trying to load an image from directory and place it as an icon in JLabel. But when the image size ... (bi); image_label.setIcon(newIcon); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Running Thread by calling start() and run(), what is the difference?

It may be a basic question, i was confused with this, in one file i have like this : public class MyThread ... for better answer SO guys.Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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173 views

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java - How to rotate a rectangle after reaching specified position?

I would like to rotate a rectangle when e.g. y position achieve specified position. I would like to behave a rectangle as a ... x, y, 20, 40); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Can not draw oval on a JPanel

I have a JFrame created with GUI builder of Netbeans, which contains a JPanel only. I have created a method getPanel ... to do that way. Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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295 views

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java - Converting a JFrame to a JApplet

I have a JFrame application working nicely. However now I'd like to run it on the web as an Applet. This is ... applet not need a main method? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JFreeChart: data disappears after zooming and panning

I have a JFreeChart time series chart, which displays a TimePeriodValuesCollection. The dataset contains two intervals. ... chartPanel; } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to access jtextPane in a different form?

I am developing an application where, when I select a value(file) from list it should be opened in jTextPane ... exep){exep.printStackTrace();} See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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180 views

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java - HtmlUnitDriver does not load javascript when navigating a page from an url

Here is my problem, I'm trying to load my website page for testing it but when i look at the html ... to enable javascript but nothing happened See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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99 views

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java - cracking singleton with other ways

I was doing research on singleton and I have developed a very basic singleton class.. public class SingletonObject { ... can be cracked..!! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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214 views

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java - Can't find jnlp.jar in JDK 1.7

I have JDK 1.7 installed and I need to make a Java Web Start application. I searched the internet and found ... use JNLP API please tell me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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264 views

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java - Constraint Violation when persisting One To Many relation

In a spring mvc application using hibernate and MySQL, I am getting the following constraint violation exception: ... for the BaseEntity class. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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323 views

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java - how to get field page in PDFBox API 2?

i'm trying to get the field page in my project, and i dont know how to get the page number for each ... page numbers of the fields? thanks ron See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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130 views

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java - Once I've written a builtin, what do I need to do to make the reasoners aware of it?

I have written a custom builtin to use in my Project but I do not really know how I can use it. I have ... (or include) something in some files? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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248 views

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java - why does "STRING".getBytes() work different according to the Operation System

I am running the code below and I am getting different outcome from "some_string".getBytes() depending if I am in Windows ... 't found"); } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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252 views

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java - No resultset if the store procedures does an update before the select on MSSQL server 2005

Does any one have any idea why I wont get a resultset if I do an update before the select in a store ... ='Foo' where ComputerName='bar'; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get output from a process

This is a second part to my question here. I now have a process but I want to know how to get the output ... way I'm calling exec() correct? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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121 views

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java - Firebase : I get in trouble when I sign in with Google

I have this mistake when I log in with Google com.google.firebase.database.DatabaseException: Failed to get ... moveTaskToBack(true); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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213 views

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java - Simple animation using Thread.sleep() in ActionListener

I'm having trouble with this code I am using to create a roulette wheel. The goal is to spin the wheel when I ... repaint(); count++; } } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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135 views

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java - How to add buttons inside a cell of jtable and give it action

i know this has been answered before but considering im still a newbie i cant figure out a way to give ... ! Kind regards, Romulo Romero See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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225 views

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java - how does jvm enter in public static void main?

How can jvm enter in default class: class try1 { public static void main(String args[]) { ... } } In it ... so how does jvm enter this class? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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128 views

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java - Binding a JobIntentService to a Activity

I want to run an long running operation in Android. Say the task would run for about 5-10 mins. For this ... Any Help would be really grateful. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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160 views

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java - Calling JNI_CreateJavaVM function twice

I'm using a library that calls the JNI_CreateJavaVM function inside the library code. However, I also need some ... created inside the library. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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152 views

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java - Display JTable with JavaFX

I'd like to read numbers from a web page and use them in a program. This program displays the web page, but how ... width) { return 500; } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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186 views

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java - Retrieve Init parameters outside servlet

I have a 3-tier application I have to modify. I'm totally new to the entire webstuff of Java, so bear with me ... 'm stuck on how to fix this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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99 views

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java - How to select a line

So I'm trying to figure out how to implement a method of selecting lines or edges in a drawing area but my math ... I do this? return false; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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