在运行以下代码时,系统报错 Operator '&' cannot be applied to 'int', 'boolean' 原因:J在ava语法中关系运算符的优先级大于逻辑运算符,所以先算(a-1) != 0得到一个boolean类型的值。&左右是布尔类型时会转换成逻辑运算符进行逻辑运算,否则会进行位运算。int & boolean操作符两边类型不一致显然不行,无法判定...
System.out.println("冬天"); }; 1. 2. 3. 4. 5. 6. 7. 8. 9. 程序报错:Operator ‘<=’ cannot be applied to ‘boolean’,‘int’ 原因是Java中 if 语句不支持这样的表达方式。正确的表达方式应该为 if( 3<= i && i <= 5 ){ System.out.println("春天"); }else if( 6 <= i && ...
ERROR in Cannot use 'in' operator to search for 'providers' in null 这个错误一直伴随着我好久,...
当然是不行啦 ！操作符一般后面是boolean类型
I keep getting operator & cannot be applied to boolean.java.lang.String when i try to compile. here is my code /* Determines type of triangle based on length of sides. */ import javax.swing.JOptionPane; public class Triangles { public static void main(String[] args) { //get the ...
CS0023: Operator '.' cannot be applied to operand of type 'void' CS0029: Cannot implicitly convert type 'string' to 'System.Web.UI.WebControls.DropDownList' CS0103: The name 'Helper' does not exist in the current context CS0104: 'Image' is an ambiguous reference between 'System.Web.U...
只能换成if else，switch不适合你这样的判断
不能把布尔值转为整型 x==0
public class Main { static String Str( String A,String B,int Inte ) { if( Inte == 1 ) { return A + B; } return ""; } public static void main(String[] args) { System.out.println( Str("aaa","bbb",1)); }}if( Inte == 1...
if(this.i=b2.i){ //在eclipse运行，这个语句会报错，说是类型不匹配 =是赋值运算符 要比较必须使用==