publicclassStringCheckExample{ publicstaticvoidmain(String[] args){ // 定义一个可能为null或空的String变量 StringmyString=null;// 我们可以根据需要更改这个变量的值 // 判断String是否为null或空 if(myString ==null|| myString.isEmpty) { System.out.println("The string is null or empty."); }el...
publicclassStringNullOrEmptyCheck{publicstaticvoidmain(String[] args){// 示例1:测试一个为null的字符串Stringstring1=null; checkString(string1);// 示例2:测试一个空字符串Stringstring2=""; checkString(string2);// 示例3:测试一个非空非null的字符串Stringstring3="Hello, World!"; checkString(stri...
publicclassStringCheckExample{publicstaticvoidmain(String[] args){// 定义一个可能为null或空的String变量StringmyString=null;// 我们可以根据需要更改这个变量的值// 判断String是否为null或空if(myString ==null|| myString.isEmpty()) { System.out.println("The string is null or empty."); }else{ ...
publicclassStringNullOrEmptyCheck{publicstaticvoidmain(String[]args){// 示例1:测试一个为null的字符串Stringstring1=null;checkString(string1);// 示例2:测试一个空字符串Stringstring2="";checkString(string2);// 示例3:测试一个非空非null的字符串Stringstring3="Hello, World!";checkString(string3);...
String is emptyString is not emptyStringNotNullOrEmptyStringIsEmptyStringNotEmpty 旅行图 最后,我们再用mermaid语法绘制一个旅行图,表示我们判断字符串是否为null或者是空字符串的旅程: journey title Journey of String Evaluation section Check String
这种情况直接用hutool的StrUtil.isEmpty()判断。这种基础函数,hutool有就别用别的了。
To check if a string is null using this operator, you can compare the string variable with the null literal (null). If the memory address of the string variable is the same as the null literal, it means the string is null. String str = null; if (str == null) { System.out....
* That functionality is available in isBlank(). * *@paramcs the CharSequence to check, may be null *@return{@codetrue} if the CharSequence is empty or null *@since3.0 Changed signature from isEmpty(String) to isEmpty(CharSequence) */public...
* @param cs the CharSequence to check, may be null * @return {@code true} if the CharSequence is empty or null * @since 3.0 Changed signature from isEmpty(String) to isEmpty(CharSequence) */ public static boolean isEmpty(final CharSequence cs) { ...
大佬救救我..改进的话,可以直接不要rightn跟rightp直接在check方法中用user中的name,password去比对。另外不要去用if (a==b) return true else false这种写