java中的toString

public class Test {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Student s1=new Student("张三",22);		
		System.out.println(s1.toString());//
		System.out.println(s1);//toString 可以默认不写，输出的是地址，重写后就可以输出内容
	}

}

主要是把toString重写让它输出内容

public class Student {
	private String nameString;
	private int age;
	
	public String getNameString() {
		return nameString;
	}
	
	public void setNameString(String nameString) {
		this.nameString = nameString;
	}
	
	public int getAge() {
		return age;
	}
	
	public void setAge(int age) {
		this.age = age;
	}
	public Student(String nameString, int age) {
		super();
		this.nameString = nameString;
		this.age = age;
	}
	public Student() {
		super();
	}
	@Override
	public String toString() {
		return "Student [name="+nameString+"age="+age+"]";
	}
	
	
	
	

}

在eclipse中的快捷键为 Ctrl+shift+s 然后单击generate toSpring()即可