constructor.java~40~

来自「提供了常用的JAVA技术的示例」· JAVA~40~ 代码 · 共 51 行

package Constructor;

class ConstructorTest {
  private int x=7;
  private double y;
  private boolean z;
  private char c='k';
  ConstructorTest(){  // 定义 没有 参数 的 构造方法
      x=1;
      y=0.1;
  }
  ConstructorTest(int x){
      //x=34;
      this.x=x;
  }
  ConstructorTest(double y){
      this.y=y;
  }
  ConstructorTest(int x,double y){
      this.x=x;
      this.y=y;
  }
  ConstructorTest(boolean z){
      this.z=z;
  }
  ConstructorTest(char c){
      this.c=c;
      //c='m';
  }
  void show(){
      System.out.println("x="+x+"   y="+y+"   z="+z+"  c="+c);
  }
}

public class Constructor{
  public static void main(String[] args){
    ConstructorTest co1=new ConstructorTest();
    ConstructorTest co2=new ConstructorTest(3);
    ConstructorTest co3=new ConstructorTest(9.0);
    ConstructorTest co4=new ConstructorTest(5,5.9);
    ConstructorTest co5=new ConstructorTest(true);
    ConstructorTest co6=new ConstructorTest('h');
    co1.show();
    co2.show();
    co3.show();
    co4.show();
    co5.show();
    co6.show();

  }
}