java类和对象

public class ClassLearn1 {
    /**
     * 类的使用
     */
    private String name;

    public String getName(){
        int id = 0;
        setName("java");
        return id + this.name;
    }

    private void setName(String name) {
        this.name = name;
    }

    public ClassLearn1 getBook(){
        return this;
    }
}