Recent questions tagged JAVA

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java - ViewPager.setOffscreenPageLimit(0) has no effect at all. How do I only load one page at a time in a ViewPager?

even when I set oViewPager.setOffscreenPageLimit(0) my view pager still loads 1 off screen page on each side ... notifyDataSetChanged(); } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Remove all blank spaces and empty lines

How to remove all blank spaces and empty lines from a txt File using Java SE? Input: qwe qweqwe qwe qwe Output: qwe qweqwe qwe qwe Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Drawing the Cannabis Curve

Inspired by Cannabis Equation from the Math site (it refers to the Wolfram Research Cannabis Curve) I was wondering ... curve using Java-2D? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - what is difference between null and "null" of String.valueOf(String Object)

in my project ,Somewhere I have to use if n else condition to check the null variables String stringValue = null; ... " ,why this is happening? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Passing char into a method with an int parameter

The output from the following code is 123 because substring takes from beginIndex to EndIndex - 1. However, I am ... ; System.out.println(x); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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315 views

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java - Selenium getText

I want to getText() using By.id or By.cssSelector. I managed to solve my problem by doing getAttribute("value") ... " style="float:left;"/> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - print's order of execution

This program gives output - A 1 2 Shouldn't it give output - 1 A 2 since first a.i should print 1 and then a.getI() ... a.i+" "+a.getI()); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to enable H2 Database Server Mode in Spring Boot

I'm using a H2 database with a file using Spring Boot. In my application.properties, I have this entry: ... ? thanks for any help! Thorsten See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Binary XML file line #0: Error inflating class <unknown>

I have error running a quiz game. Something like this (when open gameactivity). My application stop and I ge ... > Where is the problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Exact RequestMapping with Spring

I have the following in Spring @RequestMapping("/hello") However Spring automatically adds mappings for /hello/ as ... anything else should 404 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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117 views

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java - How to remove element from an array

I have an array for example: String [][] test = {{"a","1"}, {"b","1"}, {"c","1"}}; Can anyone ... found here so far is not working for me :( See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why changes in sublist are reflected in the original list?

I know that Collections in Java are mutable when you pass them through references. I want to know exactly what ... System.out.println(list); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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137 views

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java - Oracle: OALL8 is in an inconsistent state

As part of upgrading JRun, we are moving from a 1.4 JVM to a 1.6 JVM. Now I am getting a really ... request the patch through their TAR system. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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145 views

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java - How to install XULRunner for Eclipse

I'm using the SWT browser widget to develop an application in Java with Eclipse ("Kepler"). Now I want ... on the same are highly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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319 views

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java - Why can my instance initializer block reference a field before it is declared?

My understanding is that you cannot reference a variable before it has been declared, and that all code (including instance ... ); // 10 } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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137 views

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java - How to set custom button state background color?

I have a button which contains a drawable and text. I want the background of the button to be different than ... wrong? Thanks for the help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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115 views

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java - Best way to find a substring in a string

I have a problem where I am trying to search for a substring in string. That substring may or may not be in ... answer can be in Ruby or Java. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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160 views

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java - appengine endpoint Failed to retrieve API configs with status: 500

I run appengine local dev server in eclipse with params 0.0.0.0 When I try to access any of ... google/gwt/core/ext/typeinfo/NotFoundException See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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139 views

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java - How to make HashMap work properly with custom key type?

I think my question is quite simple, however I couldn't find the solution so I decided to ask here. What i need ... to find it in its keySet. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

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java - In Selenium Webdriver which is better in terms of performance Linktext or css?

In Selenium it is always better to go locate the element with the Locator ID. And the Least locator is ... with Locators to identify element? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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129 views

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java - Map of Maps data structure

The MultiValueMap class (Apache commons collections) makes it easy to work with a Map whose values are ... Google Collections or generics. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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655 views

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java - Calculate the date of Easter Sunday

Write a program to compute the date of Easter Sunday. Easter Sunday is the first Sunday after the first full moon ... Where do I go from here? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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195 views

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java - What is the fix for class file for com.google.common.base.predicate not found?

A sselenium program I have been developing for a while now comes up with com.google.common.base.Predicate not ... there some replacement for it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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182 views

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java - IllegalArgumentException: Invalid column

Here is the logcat: 01-15 16:06:03.622: ERROR/AndroidRuntime(22300): Uncaught handler: thread main exiting due ... So the column DOES exist. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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223 views

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java - Why ImageView's getX, getY, setX and setY do not represent the actual value in the Relative Layout?

I am trying to make a simple app just to understand better how to use Touch events on Android. Right ... Pictures: FIRST PICTURE SECOND PICTURE See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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141 views

1 answer

java - JSON add to JSONArray issue

Hi All I am not the best at Json. I was trying to add some json object into a json array through a loop ... grateful if anyone can help me here. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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191 views

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java - Performance benefits of a static empty array instance

It seems common practice to extract a constant empty array return value into a static constant. Like here: ... , not return EMPTY_STRING;. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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308 views

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java - Lazy One-To-One Spring JPA and building "dynamic" JSON

I'm developing a relatively large project using Spring Boot, and in a general way I'm pretty happy with it, ... getUserProfile(){ ... } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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