constructor必须与class同名,但方法不能与class同名?

Implicit super constructor People() is undefined.Must explicitly invoke another constructor

请分析此句英文的语法结构
Note that the constructor is not explicit,which would make typical uses of any awkward and would not impart additional safety.
翻译：
注意,该构造函数不是 explicit 的,如果是的话,any 会难以使用,而且也不会增加安全性.
根据我自己的语法知识,认为which是修饰the constructor is not explicit这句话的,但是查看翻译,发现which却是修饰explicit的,难道which可以修饰形容词?（而且通过上下文,翻译是正确的）
我问题中给出了中文版的正确翻译（不是我翻译的，是书里面的），而且经过上下文分析，翻译的对的。我现在想弄明白的是为什么会翻译成这样？英文里面有没有which修饰形容词的情况？或者中文翻译是一种理解后的翻译，并非一字一句的翻译？

请分析此句英文的语法结构
Note that the constructor is not explicit,which would make typical uses of any awkward and would not impart additional safety.
翻译：
注意,该构造函数不是 explicit 的,如果是的话,any 会难以使用,而且也不会增加安全性.
根据我自己的语法知识,认为which是修饰the constructor is not explicit这句话的,但是查看翻译,发现which却是修饰explicit的,难道which可以修饰形容词?（而且通过上下文,翻译是正确的）
我问题中给出了中文版的正确翻译（不是我翻译的，是书里面的），而且经过上下文分析，翻译的对的。我现在想弄明白的是为什么会翻译成这样？英文里面有没有which修饰形容词的情况？或者中文翻译是一种理解后的翻译，并非一字一句的翻译？

/** Write a class Square whose constructor receives the length of the sides.
Then supply methods to compute the
area and perimeter of the square.
Also compute the length of the diagonal using the Pythagorean Theorem.
Use the following class as a template your tester class
*/
public class Square {
x05 public Square(double sideLength)
x05 {
x05x05Square mySquare = new Square();
x05 }
x05 public double getArea()
x05 {
x05x05double area = sideLength * sideLength;
x05x05return area;
x05 }
x05 public double getPerimeter()
x05 {
x05x05double perimeter = 4 * sideLength;
x05x05return perimeter;
x05 }
x05 public double getDiagonalLength()
x05 {
x05x05double diagonal = Math.sqrt(sideLength * sideLenght + sideLength * sideLength);
x05x05return diagonal;
x05 }
}
Square mySquare = new Square();
error:constructor Square in class Square cannot be applied to given types;
double area = sideLength * sideLength;
error:cannot find symbol
double perimeter = 4 * sideLength;
error:cannot find symbol
double diagonal = Math.sqrt(sideLength * sideLenght + sideLength * sideLength);
error:cannot find symbol
anyone can help?
thx sooo much
我另外两个程序也都有 cannotfindsymbol的问题 到底应该怎样啊