大多数现代IDE(如IntelliJ IDEA或Eclipse)都提供了生成equals和hashCode方法的工具,这些工具可以在需要时提供额外的灵活性。 通过这些步骤,你应该能够解决“generating equals/hashcode implementation but without a call to superclass”的警告,并确保你的Java类在比较和哈希时能够正确处理父类的字段。
2. 或者使用在使用@Data时同时加上@EqualsAndHashCode(callSuper=true)注解。 为什么使用lombok 的@Data 注解的时候会出现警告提示? Generating equals/hashCode implementation but without a call to superclass, even though this class does not extend java.lang.Object. If this is intentional, add '(callSuper...
package com.cxh.test1; import java.util.HashMap; import java.util.HashSet; import java.util.Set; class People{ private String name; private int age; public People(String name,int age) { this.name = name; this.age = age; } public void setAge(int age){ this.age = age; } @Override...
// Marsaglia's xor-shift scheme with thread-specific state // This is probably the best overall implementation -- we'll // likely make this the default in future releases. unsigned t = Self->_hashStateX ; t ^= (t << 11) ; Self->_hashStateX = Self->_hashStateY ; Self->_hashSt...
1、如果两个对象equals，Java运行时环境会认为他们的hashcode一定相等。2、如果两个对象不equals，他们的...
// This is probably the best overall implementation -- we'll // likely make this the default in future releases. unsigned t = Self->_hashStateX ; t ^= (t << 11) ; Self->_hashStateX = Self->_hashStateY ; Self->_hashStateY = Self->_hashStateZ ; ...
{ value=intptr_t(obj) ; }else{// Marsaglia's xor-shift scheme with thread-specific state// This is probably the best overall implementation -- we'll// likely make this the default in future releases.unsigned t=Self->_hashStateX ; t ^=(t<<11) ;Self->_hashStateX=Self->_hashState...
* address of the object into an integer, but this implementation * technique is not required by the * Java™ programming language.) * * @return a hash code value for this object. * @see java.lang.Object#equals(java.lang.Object) ...
Java Map hashCode()方法及实例该方法用于为给定的包含键和值的Map生成一个hashCode。语法int hashCode() Java Copy参数: 该方法没有参数。返回: 该方法返回给定Map的hashCode值。下面的程序显示了int hashCode()方法的实现。程序1:// Java code to show the implementation of // hashCode method in Map ...
The equality can be compared in two ways:Shallow comparison: The default implementation of equals method is defined in Java.lang.Object class which simply checks if two Object references (say x and y) refer to the same Object. i.e. It checks if x == y. Since Object class has no data...