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How to remove all white spaces in java [duplicate]
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java.lang.String class has method substring not substr , thats the error in your program.
Moreover you can do this in one single line if you are ok in using regular expression.
a.replaceAll("\\s+","");
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How to wait for several Futures?
....onFailure{case i => println(i)}
// this waits one second, then prints "java.lang.ArithmeticException: / by zero"
// the first to fail in traversal order
And:
val f1 = Future { Thread.sleep(1000) ; 5 / 0 }
val f2 = Future { 5 }
val f3 = Future { None.get }
sequenceOrBailOut(List(f1,f2,f3)).on...
Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Java 反射最佳实践概要：最简单优雅的使用反射。本文的例子都可以在示例代码中看到并下载，如果喜欢请star，如果觉得有纰漏请提交issue，如果你有更好的点子...概要：最简单优雅的使用反射。
本文的例子都可以在示例代码...
How to change JFrame icon [duplicate]
I have a JFrame that displays a Java icon on the title bar (left corner).
I want to change that icon to my custom icon. How should I do it?
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Reverse a string in Java
...lder(hi).reverse().toString()
Or, for versions earlier than JDK 1.5, use java.util.StringBuffer instead of StringBuilder — they have the same API. Thanks commentators for pointing out that StringBuilder is preferred nowadays when there is no concurrency concern.
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How to set thousands separator in Java?
How to set thousands separator in Java?
I have String representation of a BigDecimal that I want to format with a thousands separator and return as String.
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Get Android Phone Model programmatically
....RADIO = unknown
Build.SERIAL = CB5A1YGVMT
Build.SUPPORTED_32_BIT_ABIS = [Ljava.lang.String;@3dd90541
Build.SUPPORTED_64_BIT_ABIS = [Ljava.lang.String;@1da4fc3
Build.SUPPORTED_ABIS = [Ljava.lang.String;@525f635
Build.TAGS = release-keys
Build.TIME = 144792559XXXX
Build.TYPE = user
Build.UNKNOWN = un...
How to get the current date and time
How do I get the current date and time in Java?
10 Answers
10
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How do I get a platform-dependent new line character?
How do I get a platform-dependent newline in Java? I can’t use "\n" everywhere.
9 Answers
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Java: Get last element after split
...ble ways together!!
By using lastIndexOf() & substring() methods of Java.lang.String
// int firstIndex = str.indexOf( separator );
int lastIndexOf = str.lastIndexOf( separator );
String begningPortion = str.substring( 0, lastIndexOf );
String endPortion = str.substring( lastIndexOf + 1 );
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