immutableinteger.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 18 行

//: appendixa:ImmutableInteger.java
// The Integer class cannot be changed.
// {NoAutomaticTesting}
import com.bruceeckel.simpletest.*;
import java.util.*;

public class ImmutableInteger {
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("ImmutableInteger");
    ArrayList v = new ArrayList();
    for(int i = 0; i < 10; i++) 
      v.add(new Integer(i));
    // But how do you change the int
    // inside the Integer?
    monitor.expect(new String[] {});
  }
} ///:~