变量

Java 中变量分为基本类型和引用类型

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public class Main() {}
	public void main(String[] args) {
    	int num = 10;
        String s = "abc";
	}
}

基本类型:

• 数值型
  • 整型（byte short int long char）
  • 浮点型 ( float double)
• 布尔型

引用类型

- 类
- 接口
- 数组

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