Java循环语句与方法（函数）的使用

开始接触Java了，记录一下方法（函数）的使用

在封装函数的时候，Java需要加上 static 修饰符

public class Test1 {
    
    
	
	static void myPrint(){
    
    
		
		System.out.println("Leo is handsome");
	}
	
	static void calNum(int a){
    
    
		
		System.out.println("number is = "+a);
	}
	
	static void looP(){
    
    
		int i;
		
		for(i=0; i<5; i++){
    
    
			
			System.out.println("Leo is handsome");
		}
		while(i>0){
    
    
			
			System.out.println("I agree!");
			i--;
		}
	}
	
	public static void main(String[] args) {
    
    
		
		myPrint();
		calNum(5);
		looP();
	}

}

另一种方法：

public class Test2 {
    
    
	
	void myPrint(){
    
    
		
		System.out.println("Leo is handsome");
	}
	
	void calNum(int a){
    
    
		
		System.out.println("number is = "+a);
	}
	
	void looP(){
    
    
		int i;
		
		for(i=0; i<5; i++){
    
    
			
			System.out.println("Leo is handsome");
		}
		while(i>0){
    
    
			
			System.out.println("I agree!");
			i--;
		}
	}
	
	public static void main(String[] args) {
    
    
		
		Test2 t = new Test2();	//区别之处，类似结构体
		
		t.myPrint();
		t.calNum(5);
		t.looP();
	}

}

例子：

public class Test3 {
    
    
	
	static int add(int data1,int data2){
    
    
	
		return data1+data2;
		
	}
	
	static int min(int data1,int data2){
    
    
		
		return data1-data2;
	}
	
	static double mul(int data1,int data2){
    
    
		
		return data1*data2;
	}
	
	static double div(int data1,int data2){
    
    
		
		return data1/data2;
	}

	public static void main(String[] args) {
    
    
		int a = 10;
		int b = 4;
		System.out.println("相加："+add(a,b));
		System.out.println("相减："+min(a,b));
		System.out.println("相乘："+mul(a,b));
		System.out.println("相除："+div(a,b));
	}
	
}