overflow.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 21 行

//: c03:Overflow.java
// Surprise! Java lets you overflow.
import com.bruceeckel.simpletest.*;

public class Overflow {
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("Overflow");
    int big = 0x7fffffff; // max int value
    prt("big = " + big);
    int bigger = big * 4;
    prt("bigger = " + bigger);
    monitor.expect(new String[] {
      "big = 2147483647",
      "bigger = -4"
    });
  }
  static void prt(String s) {
    System.out.println(s);
  }
} ///:~