valueofexam.java

Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程序均在JDK1.6环境下编译运行正常,除了第13章需要建立ODBC数据源之外,其他程序只要有Java运行环境即可直接运行

class People {
  String name = "赵艳铎";
  int age = 25;
  public People(String name, int age) {
    this.name = name;
    this.age = age;
  }

  public String toString() {
    return "姓名:" + name + ", 年龄:" + String.valueOf(age);
  }
}

public class valueOfExam {
  public static void main(String args[]) {
    long lVar = 5252524;
    double dVar = 147.258;
    float fVar = 2.1698f;
    Double d = new Double(Math.PI);
    People p = new People("天山童姥", 99);
    System.out.println("String.valueOf(long) = " + String.valueOf(lVar));
    System.out.println("String.valueOf(double) = " + String.valueOf(dVar));
    System.out.println("String.valueOf(float) = " + String.valueOf(fVar));
    System.out.println("Double.toString() = " + d.toString());
    System.out.println("People = " + p);
  }
}