callbyreference.java

来自「JAVA编程思想源代码 值得一下 很难找的」· Java 代码 · 共 25 行

package chapter6;

public class CallByReference {

	private int a, b;

	CallByReference(int i, int j) {
		a = i;
		b = j;
	}

	public void meth(CallByReference o) {
		o.a *= 2;
		o.b /= 2;
	}

	public static void main(String args[]) {
		CallByReference ob = new CallByReference(15, 20);
		System.out.println("ob.a and ob.b before call: " + ob.a + " " + ob.b);
		ob.meth(ob);
		System.out.println("ob.a and ob.b after call: " + ob.a + " " + ob.b);
	}

}