arraysearching.java

Java编程思想 第九课 全源码

//: c09:ArraySearching.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Using Arrays.binarySearch().
import com.bruceeckel.util.*;
import java.util.*;

public class ArraySearching {
  public static void main(String[] args) {
    int[] a = new int[100];
    Arrays2.RandIntGenerator gen = 
      new Arrays2.RandIntGenerator(1000);
    Arrays2.fill(a, gen);
    Arrays.sort(a);
    Arrays2.print("Sorted array: ", a);
    while(true) {
      int r = gen.next();
      int location = Arrays.binarySearch(a, r);
      if(location >= 0) {
        System.out.println("Location of " + r + 
          " is " + location + ", a[" + 
          location + "] = " + a[location]);
        break; // Out of while loop
      }
    }
  }
} ///:~