今天在看spring security源码时，有这么一段代码：
public UserDetails build() {
String encodedPassword = (String)this.passwordEncoder.apply(this.password);
return new User(this.username, encodedPassword, !this.disabled, !this.accountExpired, !this.credentialsExpired, !this.accountLocked, this.authorities);
}其中!this.disabled没有初始化就直接取反，想着打印输出下结果看下是什么？输出结果为true.在这里取反，默认值是false吗？
验证下：
public class PrimitiveTypeTest {
private boolean v;
public boolean getV(){
return this.v;
}
public static void main(String[] args) {
System.out.print(new PrimitiveTypeTest().getV());
}
} 输出结果为false
来自为知笔记(Wiz)
标签：java,String,取反,disabled,false,默认值,public,布尔 From： https://www.cnblogs.com/baiyifengyun/p/16735945.html