arraysearching.java

来自「java编程思想是一本非常经典的书籍 此源码包涵了书籍的所有源码 书籍源码」· Java 代码 · 共 29 行

//: c11:ArraySearching.java
// Using Arrays.binarySearch().
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
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);
    System.out.println(
      "Sorted array: " + Arrays2.toString(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
      }
    }
  }
} ///:~