(@StackOverflow) 13.“Variable Might Not Have Been Initialized” 当方法中声明的局部变量未初始化时,就会发生这种错误。它也会出现在没有初始值的变量是if语句组成部分的情况下。 int x;if (condition) System.out.println(x); // x may not have been initialized 阅读此关于如何避免触发“Variable Might ...
(@StackOverflow) 13.“Variable <X> Might Not Have Been Initialized” 当方法中声明的局部变量未初始化时,就会发生这种错误。它也会出现在没有初始值的变量是if语句组成部分的情况下。 int x; if (condition) { x = 5; } System.out.println(x); // x may not have been initialized 阅读此关于如何...
int x;if (condition) { x = 5; } System.out.println(x); // x may not have been initialized 1. 2. 3. 4. 阅读此关于如何避免触发“Variable <X> Might Not Have Been Initialized”错误的讨论。(@reddit) 14.“Operator … Cannot be Applied to <X>” 当操作符用于非定义中的类型时,就会出...
如下,Listing 1中的代码并不足以保证configOptions的值和通过configOptions间接获取到的值对于线程B是可见的,因为对configOptions变量的初始化指令可能会和initialized变量的初始化指令重排序。 Listing 1. Using a volatile variable as a "guard" Map configOptions; char[] configText; volatile boolean initialized =...
System.out.println("ERROR. Check logic."); } } } // 从这里删掉它 } 11、“Variable Might Not Have Been Initialized” 在方法中声明的局部变量如果没有初始化,就会发生这种错误。如果在if语句中包含没有初始值的变量时,就会发生这种错误。 Java代码: ...
publicclassExample{publicstaticvoidmain(String []args){intx;intval =2;if(val%2!=0) { x =100; }intans = x +10;// Using a conditionally initialized variableSystem.out.println(ans); } } Output: java: variable x might not have been initialized ...
The compiler update implies an eager resolution for generic method invocations, provided that the return type is an inference variable.See 8030741.Area: security-libs/org.ietf.jgss:krb5Synopsis: sun.security.krb5.KdcComm interprets kdc_timeout as msec instead of sec...
These variables differ from their normal counterparts in that eachthread that accesses one (via itsget orset method) has itsown, independently initialized copy of the variable.ThreadLocal instances are typically privatestatic fields For example, the class belowgenerates unique identifiers local to each...
-- If there is superclass, initialize it first -- Static variable declarations and static initializers -- Instance variable declarations and instance initializers -- constructors The four rules apply only if an object is initialized. If the class is referred without a new call, only rules 1 an...
publicclassMain{// Uninitialized variable of reference type will store null until initializedprivatestaticObject emptyObject;// Uninitialized integer is a primitive type so it will store a value (e.g., 0)privatestaticintemptyInt;publicstaticvoidmain(String[] args){// Initialized integer with value...