www.pudn.com > ThinkinginJava4thEdition(SourceCode).zip > CopyingArrays.java

//: arrays/CopyingArrays.java 
// Using System.arraycopy() 
import java.util.*; 
import static net.mindview.util.Print.*; 
 
public class CopyingArrays { 
  public static void main(String[] args) { 
    int[] i = new int[7]; 
    int[] j = new int[10]; 
    Arrays.fill(i, 47); 
    Arrays.fill(j, 99); 
    print("i = " + Arrays.toString(i)); 
    print("j = " + Arrays.toString(j)); 
    System.arraycopy(i, 0, j, 0, i.length); 
    print("j = " + Arrays.toString(j)); 
    int[] k = new int[5]; 
    Arrays.fill(k, 103); 
    System.arraycopy(i, 0, k, 0, k.length); 
    print("k = " + Arrays.toString(k)); 
    Arrays.fill(k, 103); 
    System.arraycopy(k, 0, i, 0, k.length); 
    print("i = " + Arrays.toString(i)); 
    // Objects: 
    Integer[] u = new Integer[10]; 
    Integer[] v = new Integer[5]; 
    Arrays.fill(u, new Integer(47)); 
    Arrays.fill(v, new Integer(99)); 
    print("u = " + Arrays.toString(u)); 
    print("v = " + Arrays.toString(v)); 
    System.arraycopy(v, 0, u, u.length/2, v.length); 
    print("u = " + Arrays.toString(u)); 
  } 
} /* Output: 
i = [47, 47, 47, 47, 47, 47, 47] 
j = [99, 99, 99, 99, 99, 99, 99, 99, 99, 99] 
j = [47, 47, 47, 47, 47, 47, 47, 99, 99, 99] 
k = [47, 47, 47, 47, 47] 
i = [103, 103, 103, 103, 103, 47, 47] 
u = [47, 47, 47, 47, 47, 47, 47, 47, 47, 47] 
v = [99, 99, 99, 99, 99] 
u = [47, 47, 47, 47, 47, 99, 99, 99, 99, 99] 
*///:~