Module pro.eng.yui.YuiFramework

Package pro.eng.yui.yuiframe.utils

Interface IStringUtil

public interface IStringUtil

Define common String operations

Since:

1.0.0

Version:

1.0.0

Author:

yui-KITAMURA

Method Summary

Modifier and Type	Method	Description
String	concat(CharSequence... arg)
String	concat(Iterable<? extends CharSequence> arg)	get joined string
String	concatWithDelimiter(CharSequence delimiter, CharSequence... arg)
String	concatWithDelimiter(CharSequence delimiter, Iterable<? extends CharSequence> arg)	get joined string that each separated with delimiter
boolean	eq(Object first, Object second)	test the two objects String value are equal.
boolean	eq(String first, String second)	test the two strings are equal.
boolean	eqCase(Object first, Object second)	test the two objects String value are equal in Case-sensitive.
boolean	eqCase(String first, String second)	test the two strings are equal in Case-sensitive.
boolean	isEmpty(Object obj)	Check the objects string representation is empty.
boolean	isEmpty(String value)	Check the value is empty.
String	nullToEmpty(String value)	if the value is null then return ""(Empty string)

Method Details

eq

@Contract("null,null -> true; null,!null -> false; !null,null -> false; _,_ -> _")
boolean eq(String first,
 String second)

test the two strings are equal. null-safe

See Also:

• String.equalsIgnoreCase(String)

eqCase

@Contract("null,null -> true; null,!null -> false; !null,null -> false; _,_ -> _")
boolean eqCase(String first,
 String second)

test the two strings are equal in Case-sensitive. null-safe

See Also:

• String.equals(Object)

eq

@Contract("null,null -> true; null,!null -> false; !null,null -> false; _,_ -> _")
boolean eq(Object first,
 Object second)

test the two objects String value are equal.

Parameters:

first - first object to be string value

second - second object to be string value

Returns:

if two string value are same then true

See Also:

• String.equalsIgnoreCase(String)

eqCase

@Contract("null,null -> true; null,!null -> false; !null,null -> false; _,_ -> _")
boolean eqCase(Object first,
 Object second)

test the two objects String value are equal in Case-sensitive.

Parameters:

first - first object to be string value

second - second object to be string value

Returns:

if two string value are same then true

See Also:

• String.equals(Object)

concat

@Contract("_ -> new")
String concat(Iterable<? extends CharSequence> arg)

get joined string

Parameters:

arg - any list or arrays to concat

Returns:

single string value that joined all arguments

concat

@Contract("_ -> new")
String concat(CharSequence... arg)

See Also:

• concat(Iterable)

concatWithDelimiter

@Contract("_,_ -> new")
String concatWithDelimiter(CharSequence delimiter,
 Iterable<? extends CharSequence> arg)

get joined string that each separated with delimiter

Parameters:

delimiter - joint string. if null then one-space

arg - any list or arrays to concat

Returns:

single string value that joined all arguments each separated with delimiter

concatWithDelimiter

@Contract("_,_ -> new")
String concatWithDelimiter(CharSequence delimiter,
 CharSequence... arg)

See Also:

• concatWithDelimiter(CharSequence, Iterable)

isEmpty

@Contract("null -> true; !null -> _")
boolean isEmpty(String value)

Check the value is empty.

Parameters:

value - the value that you want to test

Returns:

if null or length is 0 then true, otherwise false

isEmpty

@Contract("null -> true; !null -> _")
boolean isEmpty(Object obj)

Check the objects string representation is empty.

Parameters:

obj - the object that you want to test

Returns:

true when null or the Object.toString() value is empty

See Also:

• StringUtils.isEmpty(String)

nullToEmpty

@Contract("_ -> !null")
String nullToEmpty(String value)

if the value is null then return ""(Empty string)

Parameters:

value - the String object or null value

Returns:

if the value is null then empty string(""). Other case, same as original value