什么是局部变量？

Question

class subject {

    private String sub;
    private int marks;
    private double average;

    public subject() {
        sub = "Physics";
        marks = 60;
        average = 79.5;
        int x = 20;
        double y = 30;
    }

    public void change(String a) {
        int z = 10;
        sub = a;
    }

    public String display() {
        int w = 5;
        return sub;
    }
}

这个程序中的局部变量是什么？他们是int x；双y;诠释z; int w;? 或 子；诠释z; int w;?

Answer 1

在称为局部变量的方法和构造函数中声明变量。

public subject() {
    int x = 20;
    double y = 30;
}

 public void change(String a) {
    int z = 10;
}

public String display() {
    int w = 5;
}