7/17 복습(생성자 오버로딩)

package practice1;
class Tiger{
	int a,b,c;
	Tiger(){
		System.out.println("call");
	}
	Tiger(int x){
		int a;
		a=x;
		//this.a;
	}
	Tiger(int x,int y){
		this.a =x;
		this.b = y;
	}
	Tiger(int x,int y,int z){
		a=x;
		b=y;
		c=z;
	}
	void show(){
		System.out.println(a+ " " + b+" "+c);
	}
}
public class practice1 {
	public static void main(String[] args) {
		String n1 = new String("");
		String n2 = new String();
		Tiger t1 = new Tiger();
		t1.show();
		Tiger t2 = new Tiger(10);
		t2.show();
		Tiger t3 = new Tiger(10,20);
		t3.show();
		Tiger t4 = new Tiger(10,20,30);
		t4.show();
		
	}
}

package practice1;
class Tiger{
	int a,b,c;
	Tiger(){
		System.out.println("call");
	}
	void func01(){
		System.out.println("인수전달없는함수");
	}
	void func01(int x){
		System.out.println("인수전달한개있는 함수");
	}
	void func01(int x,int y){
		System.out.println("인수전달두개있는함수");
	}
	/*void func01(int y){//인수가 한개라 인수가 달라도 안된다
	 //받아들여지는 인수가 같다.
		System.out.println("인수전달없는함수");
		}*/
}
public class practice1 {
	public static void main(String[] args) {
		Tiger t1 = new Tiger();
		t1.func01(3,5);
		t1.func01();
		t1.func01(3);
		
	}
}

package practice1;
class Tiger{
	int a,b,c;
	Tiger(){
		a=10;
		b=20;
		c=30;
		System.out.println("call");
	}
	Tiger(int x){
		a=x;
		b=20;
		c=30;
	}
	Tiger(int x ,int y){
		a=x;
		b=y;
		c=30;
	}
	Tiger(int x,int y,int z){
		a=x;
		b=y;
		c=z;
	}
	void output() {
		System.out.println(a+" "+b+" "+c);
	}
}
public class practice1 {
	public static void main(String[] args) {
		Tiger t1 = new Tiger();
		Tiger t2 = new Tiger(1);
		Tiger t3 = new Tiger(1,3);
		Tiger t4 = new Tiger(1,3,4);
		t1.output();
		t2.output();
		t3.output();
		t4.output();
	}
}